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

give the green light to sth

to give permission for someone to do something or for something to happen

Word of the Day

Highly delighted, bitterly disappointed, ridiculously cheap: adverbs for emphasis.

by Liz Walter,
October 22, 2014
We often make adjectives stronger by putting an adverb in front of them. The most common ones are very and, for a stronger meaning, extremely: He was very pleased. The ship is extremely large. However, we don’t use very or extremely for adjectives that already have a strong meaning, for example fantastic,

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