/ Dictionary / Index T teether: Meaning and Definition of Find definitions for: teeth•er Pronunciation: (tē'ur), [key] — n. a device for a baby to bite on during teething. Cf. a baby who is teething. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. teethe teeth grinding Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language