with one voice
US /wɪθ wʌn vɔɪs/
UK /wɪθ wʌn vɔɪs/

1.
異口同音に, 満場一致で
if people say or do something with one voice, they all say or do the same thing at the same time
:
•
The committee spoke with one voice against the proposal.
委員会は提案に異口同音に反対した。
•
All the students agreed with one voice to postpone the exam.
すべての学生が試験の延期に異口同音に同意した。