/ Dictionary / Index K keister: Meaning and Definition of Find definitions for: keis•ter Pronunciation: (kē'stur), [key] — n. Slang. the buttocks; rump. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: keister (Thesaurus) keiretsu Keita Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language