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English definition of “sharpen”

sharpen

verb [T]  /ˈʃɑr·pən/ us  

sharpen verb [T] (MAKE STRONGER)

to make something stronger, or to improve something: The dollar’s decline in value sharpened fears of another recession. I’m taking a course that should help me sharpen my computer skills.

sharpen verb [T] (MAKE CLEARER)

to make something clearer: Turn the knob to sharpen the focus of the slide projector.

sharpen verb [T] (MAKE SHARP)

to make something sharp or sharper: We just had these knives/scissors sharpened. He sharpened his pencil (= made the end used for writing come to a point).
(Definition of sharpen from the Cambridge Academic Content Dictionary © Cambridge University Press)
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