'Mayday' definitions:
Definition of 'Mayday'
From: WordNet
noun
An internationally recognized distress signal via radiotelephone (from the French m'aider)
Synonyms of 'Mayday'
From: Moby Thesaurus
- air-raid alarm,
- alarm,
- alarm bell,
- alarm clock,
- alarm signal,
- alarum,
- alert,
- all clear,
- beacon,
- blinking light,
- burglar alarm,
- buzzer,
- crostarie,
- fiery cross,
- fire alarm,
- fire bell,
- fire flag,
- five-minute gun,
- flashing light,
- fog bell,
- fog signal,
- foghorn,
- gale warning,
- hooter,
- horn,
- hue and cry,
- hurricane warning,
- Klaxon,
- lighthouse,
- note of alarm,
- occulting light,
- police whistle,
- signal of distress,
- siren,
- small-craft warning,
- SOS,
- still alarm,
- storm cone,
- storm flag,
- storm warning,
- tocsin,
- two-minute gun,
- upside-down flag,
- whistle