Meaning of “telephone” in the English Dictionary

(Definition of “telephone” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"telephone" in American English

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telephonenoun [ C/U ]

us /ˈtel·əˌfoʊn/ also phone

a device for speaking to someone in another place by means of electrical signals:

[ C ] Your telephone is ringing.
[ U ] I tried to reach her by telephone.
verb [ T ] us /ˈtel·əˌfoʊn/

Palmer telephoned her attorney.

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

"telephone" in Business English

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telephonenoun [ C ]

uk /ˈtelɪfəʊn/ us COMMUNICATIONS

a piece of electronic equipment that makes it possible for you to speak to someone in another place who has similar equipment, using either electrical signals sent along a system of wires, or radio signals; a phone:

the telephone service
a telephone company/network
a telephone number
You can redeem up to $50,000 of your shares by telephone.
on/over the telephone The research aims to describe how people sell on the telephone.

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telephoneverb [ I or T ]

uk /ˈtelɪfəʊn/ us COMMUNICATIONS

to communicate with someone using a phone; to phone someone:

Before you invest, telephone the Shareholder Service Center to get an account number.
Sometimes, it's quicker and easier to telephone, rather than sending an email.
For more information, telephone the number at the bottom of the screen.

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