n. & v.
--n.
1. a surprise attack by persons (e.g. troops) in a concealed position.
2 a the concealment of troops etc. to make such an attack. b the place where they are concealed. c the troops etc. concealed.
--v.tr.
1. attack by means of an ambush.
2 lie in wait for.
Etymology: ME f. OF embusche, embuschier, f. a Rmc form 'put in a wood': rel. to BUSH(1)