if Definition in Cambridge British English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Definition of "if" - British English Dictionary

See all translations

ifconjunction

uk   us   /ɪf/

if conjunction (IN THAT SITUATION)

A2 used to say that a particular thing can or will happen only after something else happens or becomes true: I'll pay you double if you get the work finished by Friday. We'll have the party in the garden if the weather's good. If not (= if the weather is not good), it'll have to be inside. If anyone calls, just say I'll be back in the office at four o'clock. If she hadn't called, I wouldn't have known. I wouldn't work for them (even) if they paid me twice my current salary. We'll deal with that problem if and when it arises. If disturbed, the bird may abandon the nest, leaving the chicks to die. although: They're great kids, even if they can be demanding.literary It was a hot, if windy day.B1 every time: If water is heated to 100°C it turns to steam. If I don't get enough sleep I get a headache. used to mean "if it is true that": I'm very sorry if I've offended you.
More examples

if conjunction (WHETHER)

B1 used to introduce a clause, often in indirect speech, that shows two or more possibilities: Mrs Kramer called half an hour ago to ask if her cake was ready. I don't care if he likes it or not - I'm coming! I was wondering if you'd like to come to the cinema with me this evening?
Compare
More examples

if conjunction (REQUEST)

used when you want to make a polite request or remark: If you'd like to take a seat, Mr Chang will be with you in a moment. Would you mind if I open/opened (= can I open) the window? There are, if you don't mind me saying so, one or two problems with this plan.
Grammar

ifnoun [C usually singular]

uk   us   /ɪf/ informal
something that is not certain or not yet decided: There's a big if hanging over the project (= it is uncertain whether the project will happen).
(Definition of if from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of if?
Add Cambridge dictionaries to your browser to your website

Definitions of “if” in other dictionaries

Word of the Day
follow

If you follow a particular person on Twitter� (= a website where people can publish short remarks or pieces of information), you choose to see the messages that that person posts (= publishes) on the website.

Word of the Day

July 4th, Bastille Day, and the language of revolution.
July 4th, Bastille Day, and the language of revolution.
by Liz Walter,
July 01, 2015
With America’s Independence Day on the 4th and France’s Bastille Day on the 14th, July certainly has a revolutionary theme, so this blog looks at words and phrases we use to talk about the dramatic and nation-changing events that these days celebrate. In particular, it focuses on one of the most important

Read More 

burger noun
burger noun
June 29, 2015
a menu on a computer screen comprising three short parallel horizontal lines which the user clicks to see options Definitely use a burger. You could put the settings in the burger menu too. Fix the settings to the bottom of the burger menu and use a vertically scrolling contact list that scrolls behind

Read More