Definition of cutting edge

• in accord with the most fashionable ideas or style; "wears only the latest style"; "the last thing in swimwear"; "cutting-edge technology"; "a with-it boutique"
• 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"
• the sharp cutting side of the blade of a knife