assurance in WordNet English dictionary

1. freedom from doubt; belief in yourself and your abilities
   "his assurance in his superiority did not make him popular"; "after that failure he lost his confidence"; "she spoke with authority"
   assurance  self-assurance  confidence  self-confidence  authority  sureness 
   
2. a statement intended to inspire confidence
   "the President's assurances were not respected"
   assurance 
   
3. a binding commitment to do or give or refrain from something
   "an assurance of help when needed"; "signed a pledge never to reveal the secret"
   assurance  pledge 
   
4. a British term for some kinds of insurance
   assurance