/ Dictionary / Index O obturate: Meaning and Definition of Find definitions for: ob•tu•rate Pronunciation: (ob'tu-rāt", -tyu-), [key] — -rat•ed, -rat•ing. to stop up; close. to close (a hole or cavity) so as to prevent a flow of gas through it, esp. the escape of explosive gas from a gun tube during firing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: obturate (Thesaurus) obtund obtuse Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language