cutting edge

noun
  1. 1

    The sharp edge of the blade of a knife or other cutting tool.

  2. 2

    (by extension, often with "on the") The forefront, or position of greatest advancement in some field.

    โ€œThe company prides itself for staying at the cutting edge of technology.โ€

adjective
  1. 1

    Representing the forefront, or position of greatest advancement in some field.

Source: https://en.wiktionary.org/wiki/cutting%20edge, https://en.wiktionary.org/wiki/cutting-edge