Cutting Edge Meaning

(idiomatic) (by extension) the forefront, or position of greatest advancement in some field

Example: the sharp edge of the blade of a knife or other cutting tool
  The company prides itself for staying at the cutting edge of technology.
2011 January 29, Ian Hughes, “Southampton 1 - 2 Man Utd”[1], BBC:
  Looking far from overawed throughout, they frequently took the game to the visitors, but it was Saints' lack of a cutting edge and United's superior finishing that proved the difference in the end.