D defs.my
Entry 2 senses Webster, 1913

nifty

· IPA /ˈnɪfti/
01 adj. Very good; excellent; -- an informal term meaning about the same as groovy, sense 1.
  1. 1.
    Very good; excellent; -- an informal term meaning about the same as groovy, sense 1.[informal, 1960's] See: groovy
  2. 2.
    Stylish; attractive; -- of clothing; as, a nifty outfit.