sharpness vs definition

sharpness and definition both are nouns.

Word	Noun	Adjective	Verb	Adverb
sharpness	Yes	No	No	No
definition	Yes	No	No	No

As nouns, definition is a hyponym of sharpness; that is, definition is a word with a more specific, narrower meaning than sharpness:

Other hyponyms of sharpness include discernability, legibility, focus.

sharpness (noun)	definition (noun)
harshness of manner	clarity of outline
thinness of edge or fineness of point	a concise explanation of the meaning of a word or phrase or symbol
a strong odor or taste property
the quality of being sharp and clear
the attribute of urgency in tone of voice
the quality of being keenly and painfully felt
a quick and penetrating intelligence