Ambuscade

1. A lying in a wood, concealed, for the purpose of attacking an enemy by surprise. Hence: A lying in wait, and concealed in any situation, for a like purpose; a snare laid for an enemy; an ambush.
2. To lie in wait for, or to attack from a covert or lurking place; to waylay.
3. To post or conceal in ambush; to ambush.
4. The body of troops lying in ambush.
5. To lie in ambush.
6. A place in which troops lie hid, to attack an enemy unexpectedly.