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speakerphone

[ spee-ker-fohn ]
/ ˈspi kərˌfoʊn /
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noun
a telephone or telephone attachment equipped with both loudspeaker and microphone, thus permitting the instrument to be used without being held.
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Origin of speakerphone

1955–60, Americanism;(loud)speaker + (micro)phone or (tele)phone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use speakerphone in a sentence

British Dictionary definitions for speakerphone

speakerphone
/ (ˈspiːkəˌfəʊn) /

noun
a telephone incorporating an external microphone and loudspeaker, allowing several people to participate in a call at the same time
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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