/ Dictionary / Index H hot cap: Meaning and Definition of Find definitions for: hot' cap" Pronunciation: [key] a plastic or paper bag or small tentlike structure placed over plants in early spring to protect them from frost. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hot cake hot-cathode tube 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