federal bureau of investigation federal aviation agency • federal bureau of prisons · · · Info · Definitions · Characters · · federal bureau of investigation · · Text Common · · Latin · · Scripts 31 · · Length 12 · · Syllables Definitions · · · (noun) a federal law enforcement agency that is the principal investigative arm of the Department of Justice. Synonyms: Federal Bureau of Investigation, FBI. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076