1 [reporting verb] tell someone something positively to dispel any doubts: [with object and clause]:Tony assured me that there was a supermarket in the village [with object and direct speech]:‘I quite understand,’ Mrs Lewis assured her [with object]:they assured him of their full confidence
(assure oneself) make sure of something:she assured herself that he was asleep
2 [with object] make (something) certain to happen:victory was now assured [with clause]:their influence assured that the report would be tough
(be assured of) be certain to get:you would be assured of a welcome
3chiefly British cover (a life) by assurance:we guarantee to assure your life
secure the future payment of (an amount) with insurance:the sum assured can be paid as a lump sum
