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