Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “certainly”

certainly

adverb uk   /ˈsɜː.tən.li/ us    /ˈsɝː-/

certainly adverb (IN NO DOUBT)

A2 used to reply completely or to emphasize something and show that there is no doubt about it: She certainly had a friend called Mark, but I don't know whether he was her boyfriend. "This is rather a difficult question." "Yes, it's certainly not easy." "Do you think more money should be given to education?" "Certainly!" "Had you forgotten about our anniversary?" "Certainly not! I've reserved a table at Michel's restaurant for this evening." A2 used when agreeing or disagreeing strongly to a request: "Could you lend me £10?" "Certainly." "Did you take any money out of my purse?" "Certainly not!"

certainly adverb (EXTREMELY LIKELY)

very likely to happen: She will certainly win the election if the opinion polls are accurate.
(Definition of certainly from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of certainly?
Browse related topics

You are looking at an entry to do with Certainty, but you might be interested in these topics from the Chance and possibility topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “certainly” in other dictionaries

Word of the Day

look on the bright side

to find good things in a bad situation

Word of the Day

The language of work

by Kate Woodford,
October 15, 2014
Most of us talk about our jobs. We tell our family and friends interesting or funny things that have happened in the workplace (=room where we do our job), we describe – and sometimes complain about – our bosses and colleagues and when we meet someone for the first time, we tell

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More