/ Dictionary / Index T tonsillectomy: Meaning and Definition of Find definitions for: ton•sil•lec•to•my Pronunciation: (ton"su-lek'tu-mē), [key] — pl. -mies. the operation of excising or removing one or both tonsils. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tonsillectomy (Thesaurus) tonsil tonsillitis Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language