Sharp
Part of speech: adverb
Definition: Exactly. In a higher pitch than is correct or desirable.
Part of speech: verb
Definition: To raise the pitch of a note half a step making a natural note a sharp.
Part of speech: noun
Definition: The symbol ♯, placed after the name of a note in the key signature or before a note on the staff to indicate that the note is to be played a semitone higher. A note that is played a semitone higher than usual; denoted by the name of the note that is followed by the symbol ♯. A note that is sharp in a particular key. The scale having a particular sharp note as its tonic. Something which is sharp; usually used in the plural. A hypodermic needle. A scalpel or other edged instrument used in surgery. A dishonest person; a cheater.
Part of speech: adjective
Definition: Able to cut easily. Intelligent. Able to pierce easily; pointed. Higher than usual by one semitone (denoted by the name of the note followed by the symbol ♯). Higher in pitch than required. Having an intense, acrid flavour. Something sudden and intense. Illegal or dishonest. Exact, precise, accurate; keen. Offensive, critical, or acrimonious, as sharp criticism. Stylish or attractive. Observant; alert; acute.
Example sentence: Sometimes, wearing a scarf and a polo coat and no makeup and with a certain attitude of walking, I go shopping or just look at people living. But then, you know, there will be a few teenagers who are kind of sharp, and they'll say, 'Hey, just a minute. You know who I think that is?' And they'll start tailing me. And I don't mind.
Perceptive
Part of speech: adjective
Definition: having or showing keenness of perception, insight, understanding, or intuition
Example sentence: Your camera is the best critic there is. Critics never see as much as the camera does. It is more perceptive than the human eye.