1. 异口同声：in accord with 与......一致 | in chorus 异口同声 | in collaboration with 与......合作

2. 一齐;齐声：in chaos混乱,纷乱 | in chorus一齐;齐声 | go to the cinema看电影

3. 一齐、一致、共同：cheer up 使高兴、使振奋、高兴起来、 | in chorus 一齐、一致、共同 | clear away 扫除、收拾

adv

1. speaking or singing at the same time
simultaneously

e.g. they shouted `Yes!' in unison
they responded in chorus to the teacher's questions

Synonym: in unison