Pronunciation: (am'boosh),[key] —n.Also,am'bush•ment. 1. an act or instance of lying concealed so as to attack by surprise: The highwaymen waited in ambush near the road. 2. an act or instance of attacking unexpectedly from a concealed position.
3. the concealed position itself: They fired from ambush. 4. those who attack suddenly and unexpectedly from a concealed position.