D defs.my
Entry 3 senses Webster, 1913

happening

· IPA /ˈhæpɪnɪŋ/
01 n. something that happens; an occurrence; an event.
  1. 1.
    something that happens; an occurrence; an event.
  2. 2.
    An event that is particularly interesting, noteworthy, or important.
  3. 3.
    An artistic or entertainment event that is unconventional, sometimes discontinuous, designed to evoke strong emotions, and sometimes involving participation by the audience.