- a post or position, as in advance of a defensive line, established for the purpose of listening to detect the enemy's movements.
- any foreign country or city viewed as a source of intelligence about an enemy or rival nation or one that is a potential enemy.
- any concealed position maintained to obtain information: The government had listening posts to keep informed of revolutionary activities.
- a forward position set up to obtain early warning of enemy movement
- any strategic position or place for obtaining information about another country or area
