Definition of posterior noun from the Oxford Advanced Learner's Dictionary



BrE BrE//pɒˈstɪəriə(r)//
; NAmE NAmE//pɑːˈstɪriər//
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(humorous) the part of your body that you sit on; your bottom Word Originearly 16th cent. (as a plural noun denoting descendants): from Latin, comparative of posterus ‘following’, from post ‘after’.
See the Oxford Advanced American Dictionary entry: posterior

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