Meaning of “dial tone” in the English Dictionary

business-english dictionary

"dial tone" in American English

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dial tonenoun [ C ]

us /ˈdɑɪl ˌtoʊn/

the continuous sound you hear when you pick up the telephone, letting you know that you can call a number

(Definition of “dial tone” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"dial tone" in Business English

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dial tonenoun [ C ]

uk us US COMMUNICATIONS

→  dialling tone :

Pick up the receiver then wait for the dialling tone.

(Definition of “dial tone” from the Cambridge Business English Dictionary © Cambridge University Press)