speakerphone
nounUK /ˈspiːkəfəʊn/
US /ˈspiːkərfoʊn/
A phone feature that lets you talk and listen without holding the phone to your ear.
She put the call on speakerphone so everyone in the car could hear.
OTHER MEANINGS
2. A telephone with a built-in loudspeaker and microphone for group conversations.
The office bought a speakerphone for the meeting room.
3. The loudspeaker mode setting on a device.
He switched his phone to speakerphone during the drive.
4. A device that amplifies sound for a room or audience.
The teacher used a speakerphone so the back row could hear.