/ Dictionary / Index B beam antenna: Meaning and Definition of Find definitions for: beam' anten"na Pronunciation: [key] — Radio. Radio. an antenna that transmits its radiation in a particular direction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. beam beam brick Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language