noun
FBI
EHF-bee-eye
noun
1
The Federal Bureau of Investigation, the United States' main domestic intelligence and federal law enforcement agency.
"The FBI opened an investigation into the fraud case."
"Agents from the FBI raided the warehouse at dawn."
How to Use FBI
Learner’s notesIn plain EnglishThe FBI is the U.S. government agency that investigates federal crimes like terrorism, organized crime, cybercrime, and major fraud.
When to use it
Always written in capital letters as an initialism; rarely spoken as a single word.
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The _____ opened an investigation into the fraud case.