/ Dictionary / Index S self-sealing: Meaning and Definition of Find definitions for: self-seal•ing Pronunciation: (self"sē'ling, self'-), [key] — adj. capable of sealing itself automatically or without the application of adhesive, glue, or moisture: a self-sealing automobile tire; self-sealing envelopes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: self-sealing (Thesaurus) self-satisfying self-seeker Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language