Definition
FIELD carries two distinct legal meanings, one archaic and one current.
1. (Property/Pleading, historical) A cultivated tract of open land used for tillage or pasture. In older pleading and conveyancing, "field" was occasionally used as a descriptive term for a parcel of agricultural land, though it was never the standard description in formal legal proceedings, where "close" was the preferred term.
2. (Constitutional Law) As used in "field preemption," the federal government's occupation of an entire subject-matter area so thoroughly that state law is displaced even where no direct conflict exists between federal and state provisions. When Congress legislates comprehensively in a field, or when the regulatory scheme is so pervasive as to make the inference of an intent to leave no room for state supplementation reasonable, states are precluded from legislating on that subject regardless of whether their laws would contradict federal law.
3. (Tax Administration) In IRS parlance, a "field" examination or "field" audit is a review of a taxpayer's books and records conducted at the taxpayer's place of business or by a revenue agent at a location outside IRS office facilities, as distinguished from a correspondence audit or an office audit.
Common Language
Modern common usage (Wiktionary): In ordinary modern English, "field" refers primarily to an open area of land, a domain of activity or study, or a spatial region in which a force operates (magnetic field, etc.).
Historical common usage (Webster's 1913): "Cleared land; land suitable for tillage or pasture; cultivated ground; the open country. A piece of land of considerable size; esp., a piece inclosed for tillage or pasture."
Editorial note: The agricultural sense of "field" in common English maps closely to the historical legal sense in property and pleading. The gap is largely between that historical usage and the modern legal term's most important function — "field preemption" — which has no counterpart in ordinary English and which a researcher encountering the word in constitutional materials must recognize as a technical term of art.
Common Confusion
"Field preemption" is one of three or four categories of federal preemption and is frequently confused with "conflict preemption." The distinction matters: conflict preemption requires actual incompatibility between state and federal law; field preemption displaces state law even when state law is entirely consistent with federal law. A researcher who treats the two as interchangeable will misread both doctrine and case outcomes. Similarly, in tax contexts, "field audit" and "office audit" are sometimes used loosely by practitioners, but the distinction carries procedural significance — field examinations typically involve revenue agents with broader discretion and examination scope than office or correspondence reviews.
Recognized Forms
/SUBTYPES
Field Preemption: A subcategory of implied preemption. Arises when the federal regulatory scheme is so pervasive that Congress is deemed to have occupied the entire field, leaving no room for state regulation, even supplementary regulation.
Field Examination (Tax): An IRS audit conducted at the taxpayer's premises or another non-IRS location, typically by a revenue agent, and generally covering more complex returns than correspondence or office audits.
Field (Property, historical): A tract of cultivated open land. Distinct from a "close" (enclosed land) and from a "garden" (a small lot used for vegetables, which courts held did not satisfy descriptions requiring a "field").
Why It Matters in Research
Researchers in the Law Mind corpus will encounter "field" in at least three unrelated doctrinal contexts, and conflating them will produce bad results.
For constitutional law research: Field preemption is the conceptually most demanding preemption category because it operates without explicit statutory command and without direct conflict. Historical cases and briefs sometimes use "occupied the field" without distinguishing field preemption from other preemption theories, so older materials require careful reading. The doctrine's contours have shifted as the Court has periodically emphasized or contracted implied preemption; sources from different eras reflect different baselines.
For property and pleading research: The historical legal sense of "field" as a land description appears in older English and early American pleading materials, conveyances, and trespass actions. Researchers reading 18th- and 19th-century materials should be alert to "field" as a geographic descriptor and understand that courts treated it as less precise than "close." The Anderson's note that a one-acre vegetable lot does not qualify as a "field" reflects real decisional law, not merely dictionary preference.
For tax research: "Field" in IRS procedure is an administrative category with procedural consequences. Understanding whether an examination is a field examination affects which IRS division is involved, what records are at issue, and the applicable procedural framework.
Cross-corpus alert: The word "field" appears throughout the Law Mind corpus as an ordinary English word (field of law, field of practice, field of inquiry). Researchers using search tools should narrow queries with accompanying doctrinal terms to avoid noise.
Historical Dictionary Support
The historical dictionaries are in agreement on the agricultural meaning but diverge in emphasis. Bouvier's defines "field" as "a cultivated tract of land" and provides case citations for both what qualifies (land used for cultivating crops) and what does not (a one-acre vegetable lot). Anderson's tracks Bouvier closely and adds the observation that a town lot can qualify as a field — a nuance relevant to early urban property disputes. Both editions of Black's are more cautious, essentially reproducing Chitty's assessment that "field" is a defensible but non-standard description in legal proceedings. None of the historical sources address field preemption or field examinations — both are 20th-century legal developments that postdate the dictionaries entirely. Researchers relying solely on historical dictionary sources will find no guidance on either modern usage.
The historical sources collectively establish that "field" was treated as a second-tier descriptive term in pleading — usable, but not preferred. This matters when reading older trespass quare clausum fregit pleadings or land descriptions where "field" appears instead of the expected "close."
Jurisdictional Note
Field preemption is a doctrine of federal constitutional law and applies uniformly across jurisdictions, though its application to specific subject-matter areas (immigration, nuclear energy, certain aspects of labor law) has been heavily litigated with varying results. The historical property sense of "field" was more commonly litigated in English and early American courts; modern property law has moved away from this terminology entirely.
Encyclopedia Cross-Reference
Federal Preemption — Express, Implied, Field, and Conflict (The Law Mind Constitutional Law Encyclopedia)
IRS Audit Office and Field Examinations (The Law Mind Tax Encyclopedia)