firm up - definition and synonyms

phrasal verb
present tense
I/you/we/theyfirm up
he/she/itfirms up
present participlefirming up
past tensefirmed up
past participlefirmed up
  1. 1
    [intransitive/transitive] to become more definite, or to make something more definite

    Negotiators will meet later this week to firm up the deal.

    Voting preferences have firmed up over the past few months.

  2. 2
    [transitive] to make the muscles in a part of your body stronger
  3. 3
    [transitive] to give someone or something what they need in order to be stronger

    They’ve agreed to firm up their peacekeeping force.

See also main entry: firm