/ Dictionary / Index T tain: Meaning and Definition of Find definitions for: tain Pronunciation: (tān), [key] — n. a thin tin plate. tin foil for the backs of mirrors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Taimyr Peninsula Tainan Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language