- of or relating to a tone-dialing system or a push-button phone operating on tone dialing.
- (sometimes initial capital letter) a tone-dialing system.
- a telephone utilizing this system.
Origin of touch-tone
An Americanism dating back to 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- of or relating to a telephone dialling system in which each of the buttons pressed generates a tone of a different pitch, which is transmitted to the exchange