detective
/dɪˈtektɪv/noun
1- a person, especially a police officer, whose occupation is to investigate and solve crimes侦探（尤指以调查和侦破犯罪行为为职业的警官）。
1.1
- as modifier denoting a particular rank of police officer（用于修饰某一警衔）侦查的, 刑侦的：
a detective chief inspector.
总探长。
1.2
- as modifier concerning crime and its investigation刑侦, 刑事调查：
detective work.
刑侦工作。
词源
mid 19th cent.: from DETECT, on the pattern of pairs such as elect, elective. The noun was originally short for detective policeman, from an adjectival use of the word in the sense 'serving to detect'.