Ambush

1. v. t. The troops posted in a concealed place, for attacking by surprise; liers in wait.
2. v. t. A disposition or arrangement of troops for attacking an enemy unexpectedly from a concealed station. Hence: Unseen peril; a device to entrap; a snare.
3. v. t. A concealed station, where troops or enemies lie in wait to attack by surprise.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.