Definition of Mayday noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈmeɪdeɪ//
; NAmE NAmE//ˈmeɪdeɪ//
[uncountable] Travelling by boat or ship
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an international radio signal used by ships and aircraft needing help when they are in danger From the French venez m’aider, ‘come and help me’. See related entries: Travelling by boat or ship
See the Oxford Advanced American Dictionary entry: Mayday