1. Take responsibility for ensuring that something happens or is done
   "He made sure of arriving early to every meeting";
   - make a point, see to it, ensure
    
2. Carefully verify or confirm something
   "make sure that all doors are locked before leaving";
   - see, check, insure, ensure, ascertain, make certain

Derived forms: making sure, made sure, makes sure

Type of: act, move, verify