definition of
posterior

[1] #1 posterior a. located at or near or behind a part or near the end of a structure. wn

[2] #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] #3 posterior n. [back tooth] a tooth situated at the back of the mouth. wn

[4] #4 posterior s. [later, ulterior] coming at a subsequent time or stage; "without ulterior argument"; "the mood posterior to". wn