WordWeb Online

1. From that time
   "happy since getting married"
   - as of

1. For the reason that; on account of
   "Since it's snowy, let's go skiing"
   - as, because, for

1. In the past
   "long since"
   - ago
    
2. Happening at a time subsequent to a reference time
   - subsequently, later, afterwards, afterward, after, later on

Encyclopedia: Since