A speakerphone is a phone that has a microphone and a loudspeaker, allowing you to talk to someone without putting the phone to your ear, as well as allowing other people to hear the person you are talking to.
...a 10-channel cordless speakerphone with 13-number memory.
She put me on speakerphone and he heard me talking.
speakerphone in British English
(ˈspiːkəˌfəʊn)
noun
a telephone incorporating an external microphone and loudspeaker, allowing several people to participate in a call at the same time
speakerphone in American English
(ˈspikərˌfoʊn)
US
noun
a telephone with a speaker and microphone that enables more than one person to take part in a call
Examples of 'speakerphone' in a sentence
speakerphone
'And I'd get a half-day,' shouted the temp who was listening on speakerphone.
Jenny Colgan LOOKING FOR ANDREW MCCARTHY (2002)
"The barely audible static from the speakerphone found resonance in the kitchen, the sudden depth of stereo sound.