- the first day of May, long celebrated with various festivities, as the crowning of the May queen, dancing around the Maypole, and, in recent years, often marked by labor parades and political demonstrations.
- the international radiotelephone distress signal, used by ships and aircraft.
- the international radiotelephone distress signal
- the first day of May, traditionally a celebration of the coming of spring: in some countries now observed as a holiday in honour of workers
- (as modifier)
