/ Dictionary / Index H heat lamp: Meaning and Definition of Find definitions for: heat' lamp" Pronunciation: [key] a lamp fitted with an infrared bulb to supply heat esp. as part of physical therapy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heat island heat lightning 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