for sure - definition and synonyms

  1. 1

    I will call you tomorrow for sure.

    ‘Are you going on Friday?’ ‘I don’t know for sure.’

    that’s for sure:

    Ashe was an incredible tennis player, that’s for sure.

  2. 2
    American spoken used for agreeing with someone

    Let’s have lunch together next week.’ ‘For sure.’

See also main entry: sure