/ Dictionary / Index C cooler: Meaning and Definition of Find definitions for: cool•er Pronunciation: (k'lur), [key] — n. a container or apparatus, as an insulated chest, in which something may be cooled or kept cool. anything that cools or makes cool; refrigerant. an air conditioner. a tall drink, consisting of liquor, soda, and a fruit garnish. See jail: He was in the cooler for three months for petty theft. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cooler (Thesaurus) coolant Cooley Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language