ETYM For sins, contr. from Old Eng. sithens, sithenes, formed by an adverbial ending (cf. Besides) from Old Eng. sithen, also shortened into sithe, sin, as. siththan, syththan, seoththan, afterward, then, since, after.
1. From a definite past time until now.
2. In the time past, counting backward from the present; before this or now; ago.
3. Because; as the result of.