Definition of "sharp" []

• Having a thin edge or a fine point suitable for or capable of cutting or piercing. (adjective)
• Having clear form and detail: a sharp photographic image. (adjective)
• Terminating in an edge or a point: sharp angular cliffs; a sharp nose. (adjective)
• Clearly and distinctly set forth: sharp contrasts in behavior. (adjective)
• Abrupt or acute: a sharp drop; a sharp turn. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "But if the first pedal is now pushed down into the second notch the original F [flat] string is still further shortened and now sounds the pitch F [sharp] (giving us the key of G), and if all the other pedals are likewise successively lowered to the second notch we get in turn all the _sharp keys_ -- D, A, E, B,"
• "To illustrate the difference in basic attitude, the term “sharp business practices” needs no explanation, whereas ’sharp scientific practices’ might imply just the opposite of the prior phrase."
• "The new neighbor was caught now, her expression sharp as a pencil point."