Field day Meaning, Definition & Usage

  1. noun (military) a day for military exercises and display
  2. noun a day for outdoor athletic competition
  3. noun a time of unusual pleasure and success
  4. noun a day devoted to an outdoor social gathering
    picnic; outing.

WordNet


Definitions
  1. . (a) A day in the fields. (b) (Mil.) A day when troops are taken into the field for instruction in evolutions. Farrow. (c) A day of unusual exertion or display; a gala day.

Webster 1913