mayday
nounUK /ˈmeɪdeɪ/
US /ˈmeɪdeɪ/
A special word people say on a radio when they are in big trouble and need help fast.
The pilot shouted "mayday" into the radio when the engine caught fire.
OTHER MEANINGS
2. The international radio distress signal used by ships and aircraft.
The coast guard picked up a mayday from the sinking boat.
3. A celebration of the first day of May, especially in the past.
The villagers danced around the maypole on May Day.
4. A call for help in any serious situation.
When the project fell apart, the manager sent out a mayday to the whole team.