- Of, relating to, or being a telephone with which the user places calls by pressing pushbuttons that generate and transmit tones of differing pitch, these tones corresponding to the digits of the number being called. (adjective)
- A touch-tone telephone. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.