MAYDAY


Meaning of MAYDAY in English

may ‧ day /ˈmeɪdeɪ/ BrE AmE noun [singular]

[ Date: 1900-2000 ; Language: French ; Origin: m'aider 'help me' ]

a radio signal used to ask for help when a ship or plane is in serious danger ⇨ SOS

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.