From Longman Business Dictionary
cutting edgeˌcutting ˈedge noun [countableC] if a company or its work is at the cutting edge of an activity, they are working in the most advanced area of it, using the newest methods, systems, equipment etccutting edge ofThe scientific and engineering skills which we have developed are at the cutting edge of nuclear technology.
—cutting-edge adjectiveadj [only before a noun]exciting, cutting-edge media projects