Nicety \Ni"ce*ty\, n.; pl. Niceties. [OE. nicet['e] foolishness.]

1. The quality or state of being nice (in any of the senses of that word.).

The miller smiled of her nicety. --Chaucer.

2. Delicacy or exactness of perception; minuteness of observation or of discrimination; precision.

3. A delicate expression, act, mode of treatment, distinction, or the like; a minute distinction.

The fineness and niceties of words. --Locke.

To a nicety, with great exactness or accuracy.

Source: Webster's Revised Unabridged Dictionary (1913)