make sure - definition and synonyms

  1. 1
    to check something so that you can be sure about it

    I think I locked it but we’d better make sure.

    make sure (that):

    I just wanted to make sure you knew where to go.

    make sure of:

    Always make sure of your facts before accusing anyone.

  2. 2
    to take the action necessary to be sure that something will happen or be done
    make sure (that):

    Police were there to make sure there was no violence.

See also main entry: sure