/ Dictionary / Index C clk.: Meaning and Definition of Find definitions for: clk. Pronunciation: [key] clerk. clock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. clivia clo. Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language