Emily Dickinson Lexicon

AM'BUSH, n. [Fr. embûche, of in and bush; Dan. busk; D. bosch; Germ. busch; Fr. bosquet, boscage, bocage, bois. See Bush.]

1. A private or concealed station, where troops lie in wait to attack their enemy by surprise.
2. The state of lying concealed, for the purpose of attacking by surprise; a lying in wait.
3. The troops posted in a concealed place for attacking by surprise. Lay thee an ambush for the city. – Josh. viii.