/ Dictionary / Index K Kleinian: Meaning and Definition of Find definitions for: Klein•i•an Pronunciation: (klī'nē-un), [key] — adj. referring to the theories formulated by Austrian child psychiatrist Melanie Klein (1882–1960). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Kleine-Levin syndrome Kleist Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language