/ˌef bi: ˈaɪ ||; ˌɛf bi ˈaɪ/abbr (US 美) Federal Bureau of Investigation; the section of the US Justice Department which tries to catch people who have committed crimes that are against the laws of the US as a whole, such as bank ROBBERY and TERRORISM （美国）联邦调查局（美国司法部辖下的一个部门，负责调查违反法律的罪行，如抢劫银行及恐怖活动）