Noun has 2 senses

• backside(n = noun.location) back end, rear - the side of an object that is opposite its front; "his room was toward the rear of the hotel"



• backside(n = noun.body) arse, ass, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush - the fleshy part of the human body that you sit on; "are you going to sit on your fanny and do nothing?"; "he deserves a good kick in the butt"