/ Dictionary / Index W waveguide: Meaning and Definition of Find definitions for: wave•guide Pronunciation: (wāv'gīd"), [key] — n. Electronics, Optics. a conduit, as a metal tube, coaxial cable, or strand of glass fibers, used as a conductor or directional transmitter for various kinds of electromagnetic waves. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: waveguide (Thesaurus) wave function wavelength Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language