WordWeb Online

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

Derived forms: field days

Type of: day, holiday [Brit], period, period of time, time period, time span, vac [Brit, informal], vacation, vacay [Brit, N. Amer, informal]

Encyclopedia: Field day