cutting edge

Noun (2)

1. 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”Synonyms: vanguardforefrontType of position, view
2. the sharp cutting side of the blade of a knifeSynonyms: knife edgeType of edgePart of blade, edge tool