Definitions: (noun) Assurance is the feeling of self confidence. (noun) An assurance is a strong promise, usually given when the listener has doubts (is unsure).
Examples: (noun) A good politician will speak with absolute assurance. (noun) Despite assurances from the contractor that everything was going well, we still felt nervous. (noun) She had been here before and could give assurance that they were on the right course.
Synonyms: nouns: guarantee, promise. confidence, certainty, security.
Academic Word List Sublist and Group: 9 C