/ ˈnaɪsəti; NAmE / noun ( pl. -ies ) ( formal )
1.
[ C , usually pl. ] the small details or points of difference, especially concerning the correct way of behaving or of doing things
2.
[ U ] ( formal ) the quality of being very detailed or careful about sth :
The nicety of his argument.
SYN precision
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WORD ORIGIN
Middle English (in the sense foolish conduct ): from Old French nicete , based on Latin nescius ignorant, from nescire not know.