Meaning

noun the fleshy part of the human body that you sit on

adjective having the lower score or lagging position in a contest

adverb in or to or toward the rear

originFrom Middle English behinde, behinden, from Old English behindan (“on the back side of, behind”), from Proto-West Germanic *bihindan, *bihindini (“on the back side of, in the rear of, behind”), from Proto-West Germanic *bi- + *hindō (“the hind side, back part”), equivalent to be- + hind. Compare Old Saxon bihindan (“behind”, adverb), Middle High German behinter (“behind; back”).

Etymology from Wiktionary, CC BY-SA 3.0