/ Dictionary / Index C cold fish: Meaning and Definition of Find definitions for: cold' fish' Pronunciation: [key] — Informal. Informal. a person who is very reserved or aloof in manner or who lacks normal cordiality, sympathy, or other feeling. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cold feet cold frame Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language