American English

Definition of speakerphone noun from the Oxford Advanced American Dictionary

 

speakerphone

 noun
noun
NAmE//ˈspikərˌfoʊn//
 
[countable, uncountable]
 
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a telephone that can be used without being held, because it contains a microphone and a loudspeaker Let me put you on speakerphone so that everyone can hear you.
See the Oxford Advanced Learner's Dictionary entry: speakerphone