touchtone

/T AH1 CH T AH0 N/

noun

1
A telephone with buttons that produce tones, one for each digit.
“a teleconference service for touch-tones only”
2
A tone produced by such a telephone.
“software to decode touch-tones”

adjective

1
Relating to a type of telephone with buttons, each of which produces a tone which corresponds to the relevant digit.

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