#1 posterior a. located at or near or behind a part or near the end of a structure. wn
#2 posterior n. [buttocks, nates, arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, keister, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, bottom, behind, derriere, fanny, ass] 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?". wn
#3 posterior n. [back tooth] a tooth situated at the back of the mouth. wn
#4 posterior s. [later, ulterior] coming at a subsequent time or stage; "without ulterior argument"; "the mood posterior to". wn
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