Definition
To quash is to void, annul, or set aside a legal proceeding, instrument, or order — to wipe it from existence as though invalid from the start. A court that quashes something declares it without legal effect, whether because it was defective in form, issued without authority, or otherwise legally insufficient.
The term appears most often in three procedural contexts:
1. Quashing an indictment or information. A court quashes a criminal charging instrument when it is so defective — in form, substance, or jurisdiction — that no valid judgment could rest upon it. This is a summary remedy, typically exercised before trial, and is distinct from a motion to dismiss on the merits.
2. Quashing a writ, subpoena, or summons. A party may move to quash a subpoena or other process that was improperly issued, overbroad, served incorrectly, or that seeks privileged or otherwise protected material. Quashing the subpoena eliminates the obligation to comply; it does not reach the underlying merits of the litigation.
3. Quashing a jury array or panel. When the process of summoning jurors was fundamentally irregular — for example, when selection was conducted by unauthorized persons — the entire array may be quashed rather than challenging individual jurors through challenge for cause.
In all uses, quash is a stronger remedy than mere dismissal or continuance: it voids the proceeding rather than pausing or correcting it.
Common Language
Modern common usage (Wiktionary): To defeat decisively or suppress; to crush or dash to pieces; to void or suppress a legal instrument.
Historical common usage (Webster's 1913): Refers the reader to "squash," emphasizing physical crushing or suppression.
The ordinary meaning — to crush or forcibly suppress — is not far from the legal meaning, but the distinction matters in research: in law, quash is a precise procedural act by a court, not merely a colloquial description of defeat. A conviction that is overturned on appeal is not "quashed" in most American usage; in British and Commonwealth usage, appellate courts do speak of quashing convictions, which can create terminological confusion when reading English-origin sources.
Common Confusion
Quash is sometimes used interchangeably with dismiss, vacate, and set aside, but each term carries distinct procedural meaning. To dismiss a case or charge ends the proceeding, often with the possibility of refiling. To vacate a judgment is to set it aside after it has been entered. To quash is typically directed at the instrument or process itself — the indictment, the writ, the subpoena — and is usually invoked at an earlier stage, before a judgment exists to vacate. In British and Commonwealth sources, quashing a conviction performs work that American courts assign to reversal or vacation on appeal. Researchers using historical English sources should be alert to this divergence.
Why It Matters in Research
The practical scope of "quash" has shifted across time and jurisdiction, and this creates real traps in historical corpus research.
In early common law sources, quashing was closely linked to the plea in abatement — the procedural device for challenging the writ or declaration on formal grounds rather than disputing the merits. Anderson's Dictionary makes this explicit: a plea in abatement prays that the writ be quashed (cassetur breve). Researchers tracing criminal procedure history need to understand that a quashed indictment in 18th- or 19th-century sources did not necessarily foreclose reindictment; the remedy addressed the instrument, not the underlying charge.
The subpoena context is the area of most active contemporary litigation and therefore most likely to appear in modern corpus materials. Search for "motion to quash" in combination with "subpoena," "overbroad," "privilege," or "undue burden" to locate procedurally live discussions. This usage has expanded significantly with third-party subpoenas in civil discovery and grand jury practice.
In English-origin sources — Blackstone, early treatises, and English case reporters — quashing a conviction is standard appellate vocabulary. American researchers must resist importing this usage into domestic doctrine, where "reversal" or "vacation" is the norm.
The array-quashing context appears frequently in jury selection materials and is important for researchers examining the history of discriminatory jury selection practices.
Historical Dictionary Support
The historical dictionaries converge on the core definition — to overthrow, abate, annul, make void — with no meaningful disagreement. Black's (both editions), Burrill, and Anderson use nearly identical language, almost certainly tracing to Spelman and Blackstone (3 Bl. Comm. 303). This uniformity reflects a term that had settled meaning well before American codification.
Bouvier and Rapalje add procedural texture that the others lack. Bouvier specifically notes that quashing operates in both civil and criminal cases and gives the jury array as an example — useful for researchers who might assume the remedy is confined to criminal practice. Rapalje's reference to Archbold's Criminal Pleading (Arch. Cr. Pl. 93) situates the indictment-quashing doctrine in its treatise lineage and flags the lunacy inquisition context, which is otherwise absent from the other sources.
What the historical dictionaries largely miss: the modern subpoena-quashing motion, which has become the most common contemporary invocation of the term, receives no treatment. Researchers should not expect historical entries to illuminate current discovery practice.
Jurisdictional Note
American federal practice and most state courts confine "quash" primarily to subpoenas, process, and pre-judgment instruments. English and Commonwealth courts use "quash" more broadly, including on appeal to describe the setting aside of convictions or administrative decisions — usage that appears routinely in older English-origin authorities in the Law Mind corpus.