/ Dictionary / Index C crossbeam: Meaning and Definition of Find definitions for: cross•beam Pronunciation: (krôs'bēm", kros'-), [key] — n. a transverse beam in a structure, as a joist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: crossbeam (Thesaurus) crossbar cross-bearer Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language