/ Dictionary / Index C caulker: Meaning and Definition of Find definitions for: caulk•er Pronunciation: (kô'kur), [key] — n. a person who caulks the seams of boats or the like. a caulking tool or device. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. caulk Caulonia Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language