state of the art

Short definition from Wiktionary

Noun

1. 1
   The condition of scientific or technical knowledge, particularly the peak or highest level thereof, at a particular time.
2. 2
   Alternative form of state of the art.

Adjective

1. 1
   At the highest level of development at a particular time; cutting-edge.
2. 2
   Alternative form of state of the art.