cutting edge

Noun

• the sharp cutting side of the blade of a knife

• the position of greatest importance or advancement; the leading position in any movement or field
  • the Cotswolds were once at the forefront of woollen manufacturing in England
    
  • the idea of motion was always to the forefront of his mind and central to his philosophy
    

Related words

• Synonyms: 
  knife edge , vanguard , forefront