1. Tell someone the truth of something with the intention of giving the listener confidence
   "I assured him that travelling to Cambodia was safe"
    
2. Inform positively and with certainty and confidence
   "I assure you that man is a crook!";
   - tell
    
3. Make certain in the future
   "Preparation will assure success!";
   - guarantee, ensure, insure, secure
    
4. Make a commitment to do (or not to do) something in the future
   "He assured them he would complete the project on time";
   - promise

Derived forms: assured, assures, assuring

Type of: affirm, assert, aver, avow, declare, persuade, pronounce, swear, verify

Encyclopedia: Assure