Definition of sharp:

part of speech: verb

To mark with a sharp.

part of speech: noun

In music, a note raised by a certain figure, itself also termed a sharp.

part of speech: adjective

Having a keen edge or a fine point; bent at an angle less than a right angle; acute of mind; of quick or nice perceptions; acid; pungent; shrill; not flat, as sounds; biting or piercing, as the wind; harsh, fierce, or severe, as words; characterised by keenness or severity; keenly attentive to one's own interest; unfair; knavish; narrow; lean; hard, as sand.

Usage examples:

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