Definition of "as of" in English

Preposition

1. At or by a specified time, with the implication that the said condition will be true from that time onward.

   • All leave is cancelled as of now.
   • The server will be down for maintenance as of tomorrow afternoon.

2. At a specified time, with the implication that the said condition was or will be true at that time.

   • The US has a population of 300 million, as of 2006.