1. (adv.) From a definite past time until now; as, he went a month ago, and I have not seen him since.

2. (adv.) In the time past, counting backward from the present; before this or now; ago.

3. (adv.) When or that.

4. (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.

5. (conj.) Seeing that; because; considering; -- formerly followed by that.