Ni"ce*ty (?), n.; pl. Niceties (#). [OE. niceté 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.