Breech \Breech\, n. [See Breeches.]

1. The lower part of the body behind; the buttocks.

2. Breeches. [Obs.]

--Shak.

3. The hinder part of anything; esp., the part of a cannon, or other firearm, behind the chamber.

4. (Naut.) The external angle of knee timber, the inside of which is called the throat.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Breech \Breech\, v. t. [imp. & p. p. Breeched; p. pr. & vb. n. Breeching.]

1. To put into, or clothe with, breeches.

A great man . . . anxious to know whether the blacksmith's youngest boy was breeched. --Macaulay.

2. To cover as with breeches. [Poetic]

Their daggers unmannerly breeched with gore. --Shak.

3. To fit or furnish with a breech; as, to breech a gun.

4. To whip on the breech. [Obs.]

Had not a courteous serving man conveyed me away, whilst he went to fetch whips, I think, in my conscience, he would have breeched me. --Old Play.

5. To fasten with breeching.

Source: Webster's Revised Unabridged Dictionary (1913)