/ Dictionary / Index P preemption: Meaning and Definition of Find definitions for: pre•emp•tion Pronunciation: (prē-emp'shun), [key] — n. the act or right of claiming or purchasing before or in preference to others. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: preemption (Thesaurus) preempt preemptive Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language