Definition
Exigence (also exigency) means urgent necessity, pressing demand, or an emergency condition that compels immediate action. In law, the term functions primarily as a threshold concept: a state of affairs so urgent that normal procedural requirements — most prominently the warrant requirement under the Fourth Amendment — yield to the immediate need. The legal force of the word is not merely descriptive urgency but normative justification: exigence is what makes an otherwise impermissible act permissible.
The term appears in two broad legal contexts:
1. Constitutional/Criminal Procedure. Exigence (or exigent circumstances) describes the factual conditions that authorize warrantless government action — typically a search, seizure, or entry — when obtaining a warrant is impracticable and delay would result in harm: destruction of evidence, escape of a suspect, threat to life or safety, or hot pursuit of a fleeing felon.
2. General Common Law. In older usage, exigence denotes any legal demand, necessity, or compulsion — the urgency that a writ, obligation, or duty places upon a person. Black's Law Dictionary captures this sense concisely: demand, want, need, imperativeness.
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Common Language
Modern common usage (Wiktionary): Redirects to exigency — an urgent situation or pressing necessity; an emergency demanding immediate attention.
Historical common usage (Webster's 1913): Redirects to exigency — a state of urgency; a pressing or critical condition requiring immediate action.
The common and legal senses share the same core (urgent necessity), but the legal use carries procedural weight the common meaning lacks. In law, exigence is not merely a description of urgency — it is a legal standard that triggers or defeats specific rights and duties. Whether a set of facts constitutes sufficient exigence to override a constitutional protection is a legal question with formal doctrine attached, not simply a judgment call about how pressing a situation feels.
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Common Confusion
EXIGENCE vs. EXIGENT CIRCUMSTANCES: These are functionally the same concept, but the phrase "exigent circumstances" is the operative term of art in modern Fourth Amendment doctrine. "Exigence" is the older, more compressed form and appears more often in historical sources and general common law contexts. Researchers searching modern case law, briefs, and secondary sources should search primarily for "exigent circumstances"; searching only for "exigence" will miss the bulk of relevant modern authority.
EXIGENCE vs. EMERGENCY: Not synonymous in law. Not every emergency creates legal exigence sufficient to excuse a warrant. Courts apply a reasonableness test: the government must show that a reasonable officer in the circumstances would have believed immediate action was necessary. A generalized emergency does not automatically satisfy the exigence standard.
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Why It Matters in Research
The terminological split between "exigence" and "exigent circumstances" is a genuine research trap. Historical legal sources — treatises, older digests, nineteenth-century case reporters — use "exigence" as the operative noun. Modern constitutional doctrine, especially post-Mapp v. Ohio, standardized around "exigent circumstances." A corpus search using only one form will produce an incomplete picture. Run both.
Black's entry is sparse and reflects the older general-law sense of the word — demand and necessity in the abstract — rather than the developed Fourth Amendment doctrine that dominates contemporary usage. Do not rely on Black's alone to understand how the term functions in criminal procedure; the encyclopedia entries in the Law Mind corpus carry the substantive load.
Jurisdictional variation matters here. State constitutional analogues to the Fourth Amendment sometimes apply a more protective standard than federal doctrine; what counts as sufficient exigence under a state constitution may be a higher bar than federal minimum. Research in state courts requires attention to local doctrine, not just federal precedent.
The term also appears outside criminal procedure — in contract law (urgent necessity excusing performance), in admiralty (distress justifying deviation), and in older common law writs — though these uses are now rarely labeled "exigence" and are more likely indexed under necessity, emergency, or force majeure in modern sources.
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Historical Dictionary Support
Black's Law Dictionary defines exigence as "demand, want, need, imperativeness" with a citation to Mackeldey's Roman Law. This entry is brief and reflects the word's function as a general term of legal necessity rather than a defined doctrinal standard. It predates the modern Fourth Amendment exigent circumstances framework entirely.
The historical dictionaries do not provide developed treatment of exigence as a constitutional doctrine — that development is judicial and largely post-twentieth century. Historical sources are therefore useful for establishing the word's baseline meaning (urgent necessity compelling action) but offer no guidance on the specific legal tests courts apply. The gap between what historical dictionaries say and what modern doctrine requires is significant, and researchers should treat the Black's entry as a starting point only.
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Jurisdictional Note
Federal Fourth Amendment doctrine on exigent circumstances sets a floor, not a ceiling. Several states — including Washington, Oregon, and others operating under independent state constitutional search-and-seizure provisions — impose stricter requirements before warrantless action will be excused. State court research should not assume federal exigent circumstances doctrine controls.
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Encyclopedia Cross-Reference
Warrantless Searches — Exigent Circumstances (Law Mind Criminal Law Encyclopedia, criminal_152)
Exceptions to the Warrant Requirement — Search Incident to Arrest, Exigent Circumstances, Automobile (Law Mind Constitutional Law Encyclopedia, constitutional_117)
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