cutting edge

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cut·ting edge • n. edge of a tool's blade. ∎  [in sing.] the latest or most advanced stage in the development of something: researchers at the cutting edge of molecular biology. ∎  [in sing.] a person or factor that contributes a dynamic or invigorating quality to a situation and thereby puts one at an advantage: the campaign began to lose its cutting edge. ∎ fig. incisiveness and directness of expression.• adj. (cut·ting-edge) at the latest or most advanced stage of development; innovative or pioneering: cutting-edge technology.