What is the meaning of Since?

From a specified time in the past.

From: referring to a period of time ending in the present and defining it by the point in time at which it started, or the period in which its starting point occurred.

1. Continuously during that period of time.

   Continuously during that period of time.

   At certain points during that period of time.

   From the time that.

   Because.

   When or that.

   dative singular of sinc

   Source: wiktionary.org