Definition of "sharpness" [sharp•ness]

• The cutting ability of an edge; keenness (noun)
• The fineness of the point a pointed object (noun)
• The product or result of being sharp. (noun)
• Pungency or acidity (noun)
• Distinctness, focus (noun)

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• "It's like watching a photo develop, give it time and the sharpness is amazing."
• "The decrease in sharpness going from f5. 6 to f11 is almost not noticeable."
• "Notice the decrease in sharpness as I increased the f-stop (decreased the aperture diameter)."