noun
1. : a center for gathering intelligence concerning an adversary
a master hand at reading political riddles, with a thousand listening posts throughout the country — Charles Michelson
establishment of normal diplomatic relations … will give us listening posts behind the bamboo curtain — N.D.Palmer
specifically : a concealed forward military position occupied during periods of reduced visibility for the purpose of detecting enemy activity by listening
2. : a shortwave radio station capable of monitoring foreign broadcasts
a listening post, whither high-powered radio sets daily brought news and views direct from all the continents — Christian Science Monitor