Longman Dictionary of Contemporary English homepage

cutting edge

 noun
     
cutting edge
1

the cutting edge (of something)

the newest and most exciting stage in the development of something
at the cutting edge (of something)
research that's at the cutting edge of genetic science
The deck represents the cutting edge in CD reproduction.
2 [singular] an advantage over other people or things:
The team are relying on Gregg to give them a cutting edge.
—cutting-edge adjective:
cutting-edge scientific discoveries
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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