/ Dictionary / Index L laser beam: Meaning and Definition of Find definitions for: la'ser beam" Pronunciation: [key] a beam of radiation produced from a laser, used in surgery, communications, weapons systems, printing, recording and various industrial processes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. laser laser chemistry Related Content Daily Word Quiz: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language