/ Dictionary / Index T tertiary color: Meaning and Definition of Find definitions for: ter'tiary col'or Pronunciation: [key] a color, as brown, produced by mixing two secondary colors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tertiary care tertiary syphilis Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language