A break period; the time set aside for rest between classes or during work. In schools it usually refers to the short free period between lessons.
昼休みの時間に図書館で昼ごはんを食べた。
I ate lunch in the library during the lunch break.
授業の間の休み時間に友達と話した。
I chatted with my friends during the break between classes.
お昼休みの時間は一時間ありますか。
Do you have an hour for your lunch break?
休み時間には運動場で遊ぶ学生が多い。
Many students play on the playground during break time.