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English definition of “whether”

whether

conjunction     /ˈweð.ər/ US  //
B1 (used especially in reporting questions and expressing doubts) if, or not: I wasn't sure whether you'd like it. She asked me whether I was interested in working for her. I'm wondering whether to have the fish or the beef. I doubt whether it'll work. I was merely questioning whether we have the money to fund such a project. It all depends on whether or not she's got the time. Anyway, it's a good story, whether or not it's true.Connecting words which express a condition whether...or B1 (used to introduce two or more possibilities) it is not important if: I'm going, whether she likes it or not. Someone's got to tell her, whether it's you or me. Let's face it - you're going to be late whether you go by bus or train.Connecting words which express a contrast Grammar:Whether not ifWe use whether and not if after prepositions:See moreGrammar:I doubt if, I don’t know whetherWe use if or whether to introduce clauses after verbs of doubting:See moreGrammar:If, whether: typical errors[talking about a trip to Australia for a year]See moreGrammar:If or whether?See moreGrammar:If and whether: indirect questionsWe can use if or whether to report indirect yes-no questions and questions with or. If is more common than whether:See moreGrammar:WhetherWhether is a conjunction.See moreGrammar:Whether in indirect questionsWe use whether in indirect yes-no questions and questions with or. We can’t leave out whether (or if):See moreGrammar:Whether … orWe use whether … or to introduce a clause giving two options or alternatives:See moreGrammar:Whether … or notWe use whether … or not or whether or not to give an opposite alternative:See more
(Definition of whether conjunction from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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