posterior Definition

posterior
adj

1. Placed behind, after or at the back of something.

Thesaurus: rear, back, behind, hind, dorsal, rearward, hinder; Antonym: anterior, front.
2. formal or old use
Coming after in time. Compare anterior.
Thesaurus: later, following, latter, subsequent, ensuing, succeeding, after; Antonym: previous.

noun

1. facetious
The buttocks.
Thesaurus: buttocks, backside, derrière, slang: behind, rear end, rear; hindquarters, tail (slang), haunches, rump, seat, bottom (slang), hind end.

Etymology: 16c: Latin, comparative of posterus coming after, from post after.