1. （警队或私人）侦探
A detective is someone whose job is to discover what has happened in a crime or other situation and to find the people involved. Some detectives work in the police force and others work privately.

2. （用于警察头衔）(英国英语中常用于 constable，sergeant 等词前）侦探，（美国英语中单独使用)警探
In Britain 'detective' is used before words such as 'constable' or 'sergeant', and in the U.S. the word 'detective' is used on its own, to indicate that a police officer is a member of the department concerned with investigating crimes.

3. (小说或故事)侦探的，破案的
A detective novel or story is one in which a detective tries to solve a crime.

4. 调查;探究
If you do some detective work, you do something to find out more about a subject or situation that puzzles you.

1. a police officer who investigates crimes

Synonym: investigatortecpolice detective

2. an investigator engaged or employed in obtaining information not easily available to the public