touch-tone (also Touch-Tone) • adj. (of a telephone) having push buttons and generating tones to dial rather than pulses. ∎ (of a service) accessed or controlled by the tones generated by these telephones. • n. trademark a telephone of this type. ∎ one of the set of tones generated by these telephones.
"touch-tone." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (March 24, 2019). https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/touch-tone
"touch-tone." The Oxford Pocket Dictionary of Current English. . Retrieved March 24, 2019 from Encyclopedia.com: https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/touch-tone