sing up - definition and synonyms

phrasal verb [intransitive] British
present tense
I/you/we/theysing up
he/she/itsings up
present participlesinging up
past tensesang up
past participlesung up
  1. to sing with a louder voice

    Sing up everyone, the people at the back can’t hear.

     Synonyms and related words
See also main entry: sing