斉せい唱しょう

noun, noun or participle which takes 'suru', transitive verb

singing in unison; chanting in unison

Refers to a group of people singing or chanting the same melody or words together, often in formal settings like school ceremonies, national anthems, or protests.

• 全ぜん校こう生せい徒とで校こう歌かを斉せい唱しょうした。

  All the students sang the school song in unison.

• デモ参さん加か者しゃはスローガンを斉せい唱しょうした。

  The demonstrators chanted slogans in unison.