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Mayday

American  
[mey-dey] / ˈmeɪˌdeɪ /

noun

  1. the international radiotelephone distress signal, used by ships and aircraft.


Mayday British  
/ ˈmeɪˌdeɪ /

noun

  1. the international radiotelephone distress signal

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Mayday

First recorded in 1925–30; from French (venez) m'aider “(come) help me,” contraction of m(e) “me” ( see also me ( def. )) aider “to help” ( see aid ( def. ))

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Meanwhile, Halliday plays Daisy, a recent arrival to the Pearl Girl squad who is really there as an undercover spy for the Gilead’s resistance group, Mayday, under the guidance of June.

From Los Angeles Times • Apr. 8, 2026

Boylan himself called in a Mayday at 3:14 a.m. and jumped overboard, which prosecutors described as abandoning ship.

From Los Angeles Times • Mar. 3, 2026

In late January, after Mayday countersued in a federal court in New York, that court temporarily blocked South Dakota’s actions.

From Salon • Feb. 9, 2026

“In that case,” a pilot responded, “we declare emergency: Mayday. Mayday, Mayday.”

From The Wall Street Journal • Dec. 21, 2025

One morning not too long before Mayday, Kate the weaver’s daughter lay down in the field and declared her baby was coming right there and right then.

From "The Midwife's Apprentice" by Karen Cushman