fasten up - definition and synonyms

phrasal verb [transitive]
present tense
I/you/we/theyfasten up
he/she/itfastens up
present participlefastening up
past tensefastened up
past participlefastened up
  1. same as fasten (sense 1)

    It’s getting cold out, so fasten up your coat.

See also main entry: fasten