Dictionary

touch–tone

adjective \ˈtəch-ˈtōn, -ˌtōn\

: having numbered buttons that produce different sounds when they are pushed

Full Definition of TOUCH-TONE

:  of, relating to, or being a telephone having push buttons that produce tones corresponding to numbers

Origin of TOUCH-TONE

from Touch-Tone, a trademark
First Known Use: 1962

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