Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “assure”

See all translations

assure

verb [T] uk   /əˈʃɔːr/ us    /-ˈʃʊr/

assure verb [T] (SAY WITH CERTAINTY)

B2 to tell someone confidently that something is true, especially so that they do not worry: The unions assured the new owners of the workers' loyalty to the company. [+ speech] "Don't worry, your car will be ready tomorrow," the mechanic assured him. [+ (that)] She assured him (that) the car would be ready the next day. The prime minister assured the electorate (that) taxes would not be increased after the election. You can rest assured (= feel confident) that I shall be there as promised.
More examples

assure verb [T] (MAKE CERTAIN)

C1 to cause something to be certain: The play's popularity has been assured by the critics' rave reviews.
More examples

assure verb [T] (PROTECT)

UK (of an organization) to promise to pay an amount of money to a person or their family if that person becomes ill, gets injured, or dies, in return for small regular payments
(Definition of assure from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of assure?
Add Cambridge dictionaries to your browser to your website

Definitions of “assure” in other dictionaries

Word of the Day

exercise

physical activity that you do to make your body strong and healthy

Word of the Day

Byronic, Orwellian and Darwinian: adjectives from names.

by Liz Walter,
April 15, 2015
Becoming an adjective is a strange kind of memorial, but it is often a sign of a person having had real influence on the world. Science is full of examples, from Hippocrates, the Greek medic born around 460 BC, who gave his name to the Hippocratic Oath still used by doctors today,

Read More 

bio-inspiration noun

April 13, 2015
the adoption of patterns and structures found in nature for the purposes of engineering, manufacturing, science, etc. The MIT researchers actually aren’t the only robotics team to turn to cheetahs for bio-inspiration.

Read More