Definition of since in English:


conjunction, preposition, & adverb

  • 1In the intervening period between (the time mentioned) and the time under consideration, typically the present.

    [as preposition] ‘she has suffered from depression since she was sixteen’
    ‘the worst property slump since the war’
    [as conjunction] ‘I've felt better since I've been here’
    [as adverb] ‘she ran away on Friday and we haven't seen her since’
    because, since, seeing that, seeing as, considering that, on account of the fact that, in view of the fact that, owing to the fact that
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  • 2[conjunction] For the reason that; because.

    ‘delegates were delighted, since better protection of rhino reserves will help protect other rare species’
    since, as, for the reason that, in view of the fact that, owing to the fact that, seeing as, seeing that
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  • 3[adverb] Ago.

    ‘the settlement had vanished long since’
    in the past, before the present, before, earlier, back, in time gone by, since, formerly, previously
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Late Middle English: contraction of obsolete sithence, or from dialect sin (both from dialect sithen ‘thereupon, afterwards, ever since’).