Definitions
1.NounA small detail or distinction."We met the new captain while we were taking enemy fire and were unable to observe the niceties of formal introductions."
2.NounSubtlety or precision of use; exactness; preciseness."A rocket-propelled grenade doesn't have the nicety of a sniper round, but you must admit its effectiveness."
3.NounA delicacy of character or feeling usually from excessive refinement; fastidiousness.
4.NounSynonym of social nicety.
5.NounThat which is delicate to the taste.
6.AdjectiveBehaving in an unpleasant or spiteful way that is seemingly, or perceived as, pleasant or agreeable.