adv when or that.
2. since ·conj seeing that; because; considering;
formerly followed by that.
3. since ·adv in the time past, counting backward from the present; before this or now; ago.
4. since ·adv from a definite past time until now; as, he went a month ago, and i have not seen him since.
5. 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.