/ Dictionary / Index D dime: Meaning and Definition of Find definitions for: dime Pronunciation: (dīm), [key] — n. a cupronickel-clad coin of the U.S. and Canada, the 10th part of a dollar, equal to 10 cents. ten dollars. a 10-year prison sentence. Seedime bag. so abundant that the value has decreased; readily available. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dime (Thesaurus) dimbulb dime bag Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language