| Noun | 1. | posterior - the fleshy part of the human body that you sit on; "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"arse, ass, behind, buns, buttocks, hind end, hindquarters, keister, nates, prat, derriere, fanny, rear end, tooshie, tush, seat, fundament, backside, bottom, rump, stern, tail end, tail, rear, bum, can, butt body part - any part of an organism such as an organ or extremity |
| 2. | posterior - a tooth situated at the back of the mouthtooth - hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense | |
| Adj. | 1. | posterior - located at or near or behind a part or near the end of a structure back - related to or located at the back; "the back yard"; "the back entrance" anterior - of or near the head end or toward the front plane of a body |
| 2. | posterior - coming at a subsequent time or stage; "without ulterior argument"; "the mood posterior to" subsequent - following in time or order; "subsequent developments" |