/ Dictionary / Index C clocker: Meaning and Definition of Find definitions for: clock•er Pronunciation: (klok'ur), [key] — n. a person who times racehorses during tryouts to determine their speed. an official who times a race. a person who maintains a record of the flow of traffic, as of visitors to a museum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. clock clock-hour Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language