if Meaning, definition in Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "if" - 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
straight

the straight part of a racetrack (= the track on which competitors race)

Word of the Day

Are you a glass-half-full person? (Everyday Idioms)
Are you a glass-half-full person? (Everyday Idioms)
by Kate Woodford,
July 29, 2015
A reader of this blog recently asked for a post on idioms that are used in everyday English. This seemed like a reasonable request. After all, if you are going to make the effort to learn a set of English idioms, you want those idioms to be useful. The question, then, was

Read More 

exoskeleton noun
exoskeleton noun
July 27, 2015
a robotic device which goes around the legs and part of the body of a person who cannot walk and allows them to move independently and in an upright position The device, known as an exoskeleton, is strapped to the outside of a person’s limbs and can then be controlled by them.

Read More