rear in various senses. It is most commonly used today in the phrase breech birth in reference to a baby who comes out of the birth canal butt-first rather than head-first. More-archaic senses seen in classic literature include:
breechcloth — a form of loincloth consisting in a strip of material passed between the thighs and held up in front and behind by a belt or string
breeches — pants
a cannon's breech — the rear of a gun
Rinaldi took the note, folded it without rising from the bed and slid it in his breeches pocket.
Book One (13% in)
Later I slept on the floor of the corridor; first putting my pocketbook with my money and papers in it inside my shirt and trousers so that it was inside the leg of my breeches.
Book Two (**% in)
I stood up, took off the breeches and pulled off the kneebrace.
Book Three (5% in)
There are no more uses of "breech" in A Farewell to Arms.