Meaning of “caller” in the English Dictionary

"caller" in American English

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callernoun [ C ]

us /ˈkɔ·lər/

a person who telephones someone else

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

"caller" in Business English

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callernoun [ C ]

uk /ˈkɔːlər/ us

COMMUNICATIONS a person who makes a phone call:

On Wednesday nearly all the phone lines were continuously busy, with callers waiting approximately 30 minutes.

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