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.

detective在线翻译

    e.g. Detectives are appealing for witnesses who may have seen anything suspicious...
           探员呼吁看到任何可疑情况的人进行举报。
    e.g. She hired a private detective in an attempt to find her daughter.
           她雇了一名私人侦探，试图找到自己的女儿。

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.

    e.g. ...Detective Inspector Ian Mosley.
           伊恩·莫斯利探长
    e.g. ..Detective Nardosa of the New York City Police Department.
           纽约市警察局的纳尔多萨警探

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.

detective的反义词

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.

    e.g. Despite careful detective work, many items have never been recovered.
           尽管进行了悉心探查，许多物品还是一直没有找回。