/ Dictionary / Index T transmission line: Meaning and Definition of Find definitions for: transmis'sion line" Pronunciation: [key] — Elect. Elect. a system of conductors, as coaxial cable, a wave guide, or a pair of parallel wires, used to transmit signals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. transmission transmission stop system 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