federal bureau of investigation
C1Formal, Official, Journalistic
Definition
Meaning
The primary domestic intelligence and security service of the United States, responsible for counter-terrorism, counter-intelligence, and criminal investigation.
A major federal law enforcement agency under the U.S. Department of Justice, often used metonymically to refer to its agents, its authority, or its characteristic methods of operation.
Linguistics
Semantic Notes
Almost always used as a proper noun with initial capitals. In informal contexts, it is almost exclusively referred to by its acronym 'FBI'. The term can refer to the institution as a whole, its headquarters, or its agents.
Dialectal Variation
British vs American Usage
Differences
The term is specific to the United States. In British contexts, it is a foreign institution, analogous domestic functions would be performed by MI5 (security service) and various police forces. The acronym 'FBI' is universally recognized.
Connotations
In American usage, it carries connotations of federal authority, forensic expertise, and sometimes bureaucratic power. In British/international usage, it often connotes American jurisdiction, iconic American law enforcement, and is frequently referenced in media and politics.
Frequency
Extremely high frequency in American English in news, legal, and political contexts. High frequency in British English in international news and cultural discussions about the US.
Vocabulary
Collocations
Grammar
Valency Patterns
The FBI + [verb] (e.g., investigates, confirms, raids)[Subject] + is under FBI investigationThe FBI's + [noun] (e.g., findings, report, involvement)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “G-men (historical slang for FBI agents)”
- “on the FBI's most wanted list”
- “have an FBI file”
Usage
Context Usage
Business
Rare, except in contexts of compliance, fraud investigations, or white-collar crime (e.g., 'The company is cooperating with an FBI probe.')
Academic
Used in political science, criminology, history, and American studies (e.g., 'The FBI's role in Cold War counter-intelligence is well-documented.')
Everyday
Common in news consumption and discussions of crime or politics (e.g., 'The FBI hasn't released a statement yet.')
Technical
Used precisely in legal, law enforcement, and intelligence communities to denote specific jurisdiction and procedures.
Examples
By Part of Speech
verb
British English
- The case was so complex it was eventually FBI-ed.
- The data was FBI'd for evidence.
American English
- The suspect's phone was FBI'd as part of the cybercrime inquiry.
- They FBI'd the whole operation after the tip-off.
adverb
British English
- The team worked FBI-style to crack the code.
- He investigated the matter FBI-thoroughly.
American English
- They swept the building FBI-quick.
- Everything was documented FBI-carefully.
adjective
British English
- He had an FBI-style approach to the audit.
- The report was incredibly FBI in its detail.
American English
- She conducted an FBI-level background check.
- Their surveillance was almost FBI-grade.
Examples
By CEFR Level
- The FBI is a police group in America.
- I saw the FBI on TV.
- The FBI investigates serious crimes in the United States.
- If you see a crime, you can call the FBI.
- According to an FBI report, cybercrime has increased significantly.
- The FBI agent explained the evidence found at the scene.
- The FBI's jurisdiction is limited to federal crimes, which often necessitates collaboration with state authorities.
- A declassified FBI dossier revealed previously unknown details about the historical case.
Learning
Memory Aids
Mnemonic
Think of the three words in order: FEDERAL (national government), BUREAU (office/agency), INVESTIGATION (its main job). The initials F-B-I are world-famous.
Conceptual Metaphor
THE FBI IS A WATCHFUL EYE / THE LONG ARM OF THE LAW. It is often conceptualized as a pervasive, omniscient authority that sees and knows everything within its domain.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'Bureau' as 'бюро' in the sense of a furniture item. It means 'ведомство' or 'агентство'.
- Do not confuse with 'ФСБ' (Russian Federal Security Service). While analogous in some functions, they are distinct institutions with different historical and legal contexts.
- The word 'Federal' specifically refers to the U.S. national government, not a federation of states in a general sense.
Common Mistakes
- Using lowercase ('federal bureau of investigation') in formal writing.
- Using 'FBI' without the definite article 'the' when referring to the organization (e.g., 'He works for FBI' is incorrect; it should be 'He works for the FBI').
- Confusing it with the CIA (which handles foreign intelligence).
Practice
Quiz
What is the primary domestic role of the Federal Bureau of Investigation?
FAQ
Frequently Asked Questions
No. The FBI is a federal agency that investigates specific federal crimes (like terrorism, espionage, major fraud). Local and state police handle everyday law enforcement in their cities and states.
In this context, 'Bureau' means a government department or agency. It comes from the French word for 'desk' or 'office', indicating an administrative organization.
Yes, FBI agents have federal jurisdiction and can make arrests anywhere in the United States and its territories for violations of federal law.
The acronym 'FBI' is shorter, universally recognized, and has become the standard lexical item for the agency in both formal and informal communication. The full name is primarily used in very formal legal or official documents.