柯林斯詞典breech /bri?t?/ (breeches/?bri?t??z/) 1. N-COUNT The breech of a gun is the part of the barrel at the back into which you load the bullets. (槍的)后膛 返回 breech劍橋詞典If a baby in the womb is in a breech position , it is lying so that the lower part of its body will come out first. （臀位、橫位等）分娩異常的 a breech birth /delivery 臀位分娩 返回 breech