/ Dictionary / Index C colorless: Meaning and Definition of Find definitions for: col•or•less Pronunciation: (kul'ur-lis), [key] — adj. without color: Pure water is colorless. pallid; dull in color: a colorless complexion. lacking vividness or distinctive character; dull; insipid: a colorless description of the parade. unbiased; neutral. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: colorless (Thesaurus) color-key color line Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language