cutting edge

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. the position of greatest importance or advancement;
the leading position in any movement or field (Freq. 1)
- 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
• Syn:
vanguard, forefront
• Hypernyms:
position, view, perspective
2. the sharp cutting side of the blade of a knife
• Syn:
knife edge
• Hypernyms:
edge
• Part Holonyms:
blade, edge tool