Since Since, prep. From the time of; in or during the time subsequent to; subsequently to; after; -- usually with a past event or time for the object. The Lord hath blessed thee, since my coming. --Gen. xxx. 30. I have a model by which he build a nobler poem than any extant since the ancients. --Dryden., Since Since, conj. Seeing that; because; considering; -- formerly followed by that. Since that my penitence comes after all, Imploring pardon. --Shak. Since truth and constancy are vain, Since neither love, nor sense of pain, Nor force of reason, can persuade, Then let example be obeyed. --Granville. Syn: Because; for; as; inasmuch as; considering. See Because.