IMPEACH - The Law Mind Legal Dictionary

IMPEACHAuthored

The Law Mind • 1527 words

Definition

To impeach means to challenge, discredit, or call into question — either the conduct of a public official or the credibility of a witness. The term carries two distinct and equally important legal meanings that operate in entirely different contexts.

1. Constitutional/Political: To impeach a public officer is to formally accuse that officer of misconduct before the designated tribunal empowered to hear and determine the charge. In the United States federal system, impeachment is the House of Representatives' act of presenting articles of impeachment against a civil officer; the Senate then conducts the trial. Impeachment does not itself remove or punish — it initiates the proceeding.

2. Evidence: To impeach a witness is to attack or undermine that witness's credibility before the fact-finder. This may be accomplished by showing prior inconsistent statements, demonstrating bias or motive to lie, introducing evidence of a witness's character for untruthfulness, or establishing through contradiction that the witness's account is inaccurate. Impeachment in this sense targets the believability of testimony, not the character of the person in any broader sense.

A third, older usage — to challenge or dispute the validity of a legal instrument, judgment, or transaction — appears in historical sources and older case law but is now largely displaced by more specific vocabulary (e.g., "attack," "collaterally attack," "vacate," "void").

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Common Language

Modern common usage (Wiktionary): To bring a legal proceeding against a public official; to charge with impropriety or discredit; to call into question; to demonstrate that testimony contradicts a prior statement. Also, archaic: to hinder or impede.

Historical common usage (Webster's 1913): To charge with a crime or misdemeanor, especially to charge a public officer before a competent tribunal with misbehavior in office. Earlier, simply to hinder or impede (now obsolete).

The gap between common and legal usage is real but subtle. In everyday political discourse, "impeach" is frequently — and incorrectly — used to mean removal from office. Legally, impeachment is only the charging step. A public official who is impeached by the House but acquitted by the Senate remains in office. The common conflation of impeachment with removal is one of the more consequential popular misunderstandings of a legal term.

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Common Confusion

IMPEACH vs. REMOVE: Impeachment and removal are sequential but distinct acts. Impeachment is the formal accusation; removal is the consequence of conviction following trial. A researcher encountering historical commentary or pleadings that treat impeachment as synonymous with removal should read carefully — the error appears in political literature more often than in legal sources, but it surfaces in both.

IMPEACH (evidence) vs. CONTRADICT: To impeach a witness encompasses several methods, only one of which is contradiction by extrinsic evidence. The collateral matters doctrine limits when extrinsic contradiction evidence is admissible. Researchers should not treat "impeach" and "contradict" as interchangeable in evidence analysis; they overlap but are not coextensive.

IMPEACH vs. ATTACK (judgment or instrument): Older authorities, including both Black's editions, use "impeach" to mean challenging the validity of a judgment, deed, or title. Modern practice uses more precise language. Researchers reading nineteenth- and early twentieth-century case law should recognize this usage and not assume an evidentiary or constitutional meaning when context concerns the validity of an instrument.

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Recognized Forms

/SUBTYPES

In the evidence context, impeachment methods recognized under the Federal Rules of Evidence and analogous state frameworks include:

— Impeachment by prior inconsistent statement (FRE 613)
— Impeachment by bias, interest, or motive (common law basis; not codified in a single federal rule)
— Impeachment by character for untruthfulness, including prior acts (FRE 608) and prior convictions (FRE 609)
— Impeachment by contradiction (governed partly by the collateral matters doctrine)
— Impeachment by sensory or mental incapacity

In the constitutional context, the recognized form is impeachment by articles, voted by the legislative body designated for that purpose.

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Why It Matters in Research

The dual meaning of "impeach" creates genuine indexing and research traps. A keyword search across a mixed corpus will return results from constitutional law, criminal procedure, evidence, and occasionally property or contract law — sometimes in the same case. Researchers must anchor their search in context before relying on hits.

In the evidence context, the law has evolved considerably. Pre-codification common law rules on impeachment were fragmented and jurisdiction-specific. The Federal Rules of Evidence (effective 1975) imposed structure, but state rules vary in significant ways — particularly regarding the admissibility of prior convictions and the permissible uses of prior inconsistent statements (substantive vs. impeachment-only). Historical sources predating 1975 will reflect doctrine that may have been superseded, modified, or preserved in different forms across jurisdictions.

The restriction on impeaching one's own witness — the voucher rule — was a major feature of common law evidence doctrine. It has been largely abrogated by FRE 607 and most modern state equivalents, but it persists in some jurisdictions and appears prominently in older treatises and cases. A researcher using pre-1975 authority on the right to impeach a party's own witness must verify current law.

In the constitutional context, researchers working on impeachment history will find that the sparse textual basis (Art. I, §§ 2–3; Art. II, § 4) has generated an outsized body of political and historical commentary. The historical dictionaries offer little guidance on constitutional doctrine; that analysis must come from primary sources and specialized secondary literature.

The "impeach a judgment" usage in older Black's editions points toward a now-archaic but once-important usage in equity practice. Researchers in pre-twentieth-century equity materials should be alert to this meaning, which has no modern procedural equivalent as a standalone action.

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Historical Dictionary Support

The four historical dictionaries converge on the same three core meanings: (1) accuse or charge a public officer before a tribunal; (2) call into question or challenge the validity of a legal instrument or transaction; (3) attack the credibility of a witness. All four capture these senses, though with varying emphasis.

Burrill traces the term to Law French (empescher) and Latin roots, connecting it etymologically to impediment — a connection Webster's 1913 preserves in noting the now-obsolete sense of "to hinder." This archaic meaning is entirely absent from modern legal usage but explains why the word carried a broader sense of obstruction or challenge before settling into its specialized legal meanings.

Anderson's is the most granular of the four on the evidentiary usage, explicitly breaking out impeachment of a document's authenticity, a judgment's regularity, and a witness's veracity as distinct applications. This reflects the broader nineteenth-century usage of "impeach" as a general term for calling anything into question — a usage that modern drafting has largely replaced with more specific vocabulary.

Black's (2nd Ed.) adds the jury-verdict application — "a jury cannot impeach their verdict" — which remains a live doctrine in modern evidence law under a different framing (FRE 606(b) and its state analogs). That the rule appears in a definition of "impeach" rather than under "verdict" or "jury" illustrates how the historical dictionaries can surface cross-cutting doctrine that modern subject-matter organization might obscure.

None of the historical dictionaries address the evidentiary impeachment methods in any systematic way — prior inconsistent statements, bias, character — because those rules were not yet codified and were governed by common law doctrine developed case by case. Researchers should treat the dictionary entries as orientation, not as a guide to operative evidence doctrine in any period.

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Jurisdictional Note

Evidentiary impeachment rules vary meaningfully across jurisdictions, particularly regarding prior felony convictions (compare FRE 609's balancing approach with stricter or more permissive state rules) and the treatment of prior inconsistent statements as substantive evidence versus impeachment-only. Constitutional impeachment procedure is exclusively federal at the national level; state constitutions provide their own impeachment mechanisms for state officers, which differ in structure, triggering conduct, and consequences.

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Encyclopedia Cross-Reference

civpro_176: Impeachment by Prior Inconsistent Statement — Rule 613 (The Law Mind Civil Procedure & Evidence Encyclopedia)
civpro_177: Impeachment by Contradiction and Collateral Matters Doctrine (The Law Mind Civil Procedure & Evidence Encyclopedia)
civpro_178: Impeachment by Character for Untruthfulness — Rules 608 and 609 (The Law Mind Civil Procedure & Evidence Encyclopedia)

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IMPEACHmain

Black's Law Dictionary • 1891

To accuse; to charge a lia- bility upon; to sue. To proceed against a public officer for crime or misfeasance, before a proper court, by the presentation of a written accusation called "articles of impeachment." In the law of evidence. To call in ques- tion the veracity of a witness, by means of evidence adduced for that purpose.

IMPEACHmain

Black's Law Dictionary (2nd Ed.) • 1910

To accuse; to charge a liability upon; to sue. To dispute, disparage, deny, or contradict; as, to impeach a judgment or decree; or as used in the rule that a jury cannot “impeach their verdict.” See Wolfgram v. Schoepke, 123 Wis. 19, 100 N. W. 1056. To proceed against a public officer for crime or misfeasance, before a proper court, by the presentation of a written accusation called “articles of impeachment.” In the law of evidence. To call in question the veracity of a witness, by means of evidence adduced for that purpose.

IMPEACHmain

Anderson's Dictionary of Law • 1890

2. To impugn, call in question, seek to disparage: as, to impeach the authenticity of a document, the irregularity or legality of a judgment or sale, one's title to negotiable paper or to property. See DISPARAGE, 2; FACIES, Prima; JUDGMENT. 3. To seek to prove unworthy of belief; to discredit: as, to impeach the veracity of a witness. To charge or accuse of want of veracity; and, to establish such charge.1 To accuse, blame, censure. Thus, to impeach one's official report or conduct is to show that it was occasioned by some partiality, bias, prejudice, inattention to or unfaithfulness in the discharge of that duty; or, that it was based upon such error that the existence of those influences may justly be inferred from the extraordinary character or grossness of that error.2 Unimpeached. Not discredited, undiscredited; not shaken in character or worth, professed or attributed. Unimpeachable. Not to be questioned as to credit; irreproachable; blameless. After a witness has been examined in chief, his credit may be impeached in various modes besides that of exhibiting the improbabilities of his story by a cross-examination: (1) By disproving the facts stated by him, by other witnesses. (2) By general evidence affecting his credit for veracity. (3) By proof that he has made statements out of court contrary to what he has testified at the trial. But this is only in matters relevant to the issue; and, beforehand, he must be asked as to the time, place, and persons involved in the supposed contradiction: upon the general question he may not remember whether he has said so or not; and justice requires that his attention be first called to the subject. Then he may correct or explain the former statement.3 By calling, the party represents his witness as worthy of credit or at least as not so infamous as to be wholly unworthy of credit. For him to attack the witness's veracity would be bad faith to the court, and IMPEACH.S 1. To call to account: as, give the power to destroy if the witness spoke unto impeach a tenant for waste.10 13 Bl. Com. 299. 23 Bl. Com. 301. Act 19 May, 1828, § 2: R. S. § 988. L. im-pars, not of a part or party. Littleton, 155 b. • Reynolds v. United States, 98 U. S. 154 (1878): Coke, Litt. 155 b. Constitution, Amd. Art. VI. • Reynolds v. United States, 98 U. S. 155 (1878), Waite, C. J., citing 11 Leigh, 659; 10 Gratt. 658; 13 III. 685; 2 Dev. & B. L. (N. Car.) 196; 74 Pa. 458; 84 id. 151. See also Northern Pacific R. Co. v. Herbert, 116 U. S. 646 (1886), cases. F. empeecher, to prevent, hinder, bar: L. impedicare, to impede; or impingere, to thrust against. 102 Bl. Com. 283; 6 Fla. 480. favorably, and to make good if he spoke favorably. Hence, at common law, while a party may contradict, and to that extent discredit, he cannot ordinarily "impeach" his own witness. An adverse witness who contradicts his former statement, thereby surprising the party calling him, may be examined as to his former statement, when 1 [White v. McLean, 47 How. Pr. 199 (1874). 2 Bryant v. Glidden, 36 Me. 47 (1853), Shepley, C. J. $1 Greenl. Ev. §§ 461-62. See Becker v. Koch, 104 Ν. Υ. 401 (1887), cases; Conrad v. Griffey, 16 How. 46-47 (1853), cases. United States v. Watkins, 3 Cranch, С. С. 442 (1829); Commonwealth v. Donahoe, 133 Mass. 408 (1882); Sheppard v. Yocum, 10 Oreg. 410 (1882); Stearns v. Merchants' Bank, 53 Pa. 492-99 (1866), cases.

IMPEACHv.

Websters Unabridged Dictionary (1913) • 1913

To hinder; to impede; to prevent. [Obs.] These ungracious practices of his sons did impeach his journey to the Holy Land. Sir J. Davies. A defluxion on my throat impeached my utterance. Howell. To charge with a crime or misdemeanor; to accuse; especially to charge (a public officer), before a competent tribunal, with misbehavior in office; to cite before a tribunal for judgement of official misconduct; to arraign; as, to impeach a judge. See Impeachment. Hence, to charge with impropriety; to dishonor; to bring discredit on; to call in question; as, to impeach one's motives or conduct. And doth impeach the freedom of the state. Shak. To challenge or discredit the credibility of, as of a witness, or the validity of, as of commercial paper.

IMPEACHn.

Websters Unabridged Dictionary (1913) • 1913

Hindrance; impeachment. [Obs.]

impeachverb

Wiktionary (English) • 2026

Wiktionary contributors • CC BY-SA 4.0 • via Kaikki
Extracted and formatted for display by Law Mind. Source link opens the current Wiktionary page and its contributor history; it is not a frozen copy of this extract.

To hinder, impede, or prevent. | To bring a legal proceeding against a public official. | To charge with impropriety; to discredit; to call into question. | To demonstrate in court that a testimony under oath contradicts another testimony from the same person, usually one taken during deposition.

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