to make sure that something happens or is definite ensure something The book ensured his success. ensure somebody something Victory ensured them a place in the final. ensure (that)… Please ensure (that) all lights are switched off.
(also insure) verbjump to other results
NAmE//ɪnˈʃʊr//Verb Forms present simple I / you / we / they ensure
he / she / it ensures
past simple ensured
-ing form ensuring