With one voice
Definition 1 of 1
Pro Tip 1/3Symbol of Unity
The phrase highlights common purpose or agreement within a group. 
When the decision was announced, the community responded with one voice against it.
Pro Tip 2/3Metaphorical Use
Used figuratively to describe harmony in opinions, not literal simultaneous speaking. 
The panel of judges agreed, with one voice, that the performance was outstanding.
Pro Tip 3/3Strong Agreement
It emphasizes the strength and conviction of a group's unanimous opinion. 
The shareholders voted with one voice to approve the merger.