1. (noun) a day devoted to an outdoor social gathering

• outing
• picnic

1. (noun) (military) a day for military exercises and display

• armed forces
• armed services
• military
• military machine
• war machine

1. (noun) (military) a day for military exercises and display

• day

2. (noun) a day for outdoor athletic competition

• day

3. (noun) a time of unusual pleasure and success

• period
• period of time
• time period

4. (noun) a day devoted to an outdoor social gathering

• holiday
• vacation