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English definition of “since”

since

conjunction (BECAUSE)    /sɪns/
B1 because; as: Since we've got a few minutes to wait for the train, let's have a cup of coffee.Connecting words which introduce a cause or reason Grammar:As, because or since?As, because and since are conjunctions. As, because and since all introduce subordinate clauses. They connect the result of something with its reason.See moreGrammar:BecauseBecause is more common than as and since, both in writing and speaking. When we use because, we are focusing on the reason:See moreGrammar:As and sinceWe often use as and since when we want to focus more on the result than the reason. As and since are more formal than because. We usually put a comma before since after the main clause:See moreGrammar:SinceWe use since as a preposition, a conjunction and an adverb to refer to a time, and as a conjunction to introduce a reason.See moreGrammar:Since: timeWe use since to refer back to a previous point in time. We use since as a preposition with a date, a time or a noun phrase:See moreGrammar:Since and tensesWhen since introduces an action or event at a point of time in the past, we can use the past simple or present perfect after since and the present perfect in the main clause:See moreGrammar:Since + -ingWe can use since + -ing form to refer to time when the subject of the verb is the same in the main clause and the subordinate clause:See moreGrammar:Since, since thenWe can use since or since then as an adverb of time when the time reference is understood from the context:See moreGrammar:Since: reasonWe use since as a subordinating conjunction to introduce a subordinate clause. We use it to give a reason for something:See moreGrammar:Since: typical errorsSee more
(Definition of since conjunction (BECAUSE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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