Touch tone

touch-tone

[tuhch-tohn]
adjective
1.
of or pertaining to a tone-dialing system or a push-button phone operating on tone dialing.
noun
2.
(sometimes initial capital letter) a tone-dialing system.
3.
a telephone utilizing this system.
Also, touchtone.


Origin:
1955–60, Americanism

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
touch-tone
 
adj
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

Collins English Dictionary - Complete & Unabridged 10th Edition
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