Breech

1. n. The external angle of knee timber, the inside of which is called the throat.
2. n. The lower part of the body behind; the buttocks.
3. n. Breeches.
4. n. The hinder part of anything; esp., the part of a cannon, or other firearm, behind the chamber.
5. v. t. To whip on the breech.

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.