Definition of stay behind in English:

stay behind

phrasal verb

  • Remain in a classroom or school at the end of teaching, especially to receive punishment.

    ‘please stay behind after class – I would like to talk to you regarding your lateness’
    • ‘He had to stay behind because he hadn't completed his homework.’
    • ‘Danz cried because her new teacher said if they were naughty they'd have to stay behind for up to an hour.’