Meaning of REASSURANCE in English

re ‧ as ‧ sur ‧ ance /ˌriːəˈʃʊərəns $ -ˈʃʊr-/ BrE AmE noun

[uncountable and countable] something that is said or done which makes someone feel calmer and less worried or frightened about a problem:

Parents are looking for reassurance about their children’s safety.

give/offer/provide reassurance

They are offering practical help and reassurance.

reassurance that

We have been given reassurances that the water is safe to drink.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.