a person who gives secret information about somebody/something to the police or the media synonym informer(向警方或报纸)提供消息的人,告密者, 线民 a police informant 警方线人 The journalist refused to reveal the identity of his informant. 记者拒绝透露他的线人的身份。
- (specialist)
a person who gives somebody information about something, for example to help them with their research (为研究等)提供资料的人;合作者