A facility established to monitor radio and microwave signals and analyse their content to secure information and intelligence for use by the security and diplomatic community and others.

A service, offered by some hotels, of the use of a baby monitor in a guest's room.

A genre of music characterized by simple and laid-back melodies.

The process of attending carefully to what a speaker is saying, involving such techniques as accurately paraphrasing the speaker's remarks.

To take an interest in.

Third-person singular simple present indicative form of listen up

simple past tense and past participle of listen up

present participle of listen up

plural of listening watch

(military, aviation) Continuous monitoring for incoming communications.