Mayday

1 of 2

communications signal

May·​day ˈmā-ˌdā How to pronounce Mayday (audio)
used as a distress call in international radio-telephone communications

May Day

2 of 2

noun

: May 1 celebrated as a springtime festival and in some countries as Labor Day

Examples of Mayday in a Sentence

Recent Examples on the Web
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Noun
In a Wednesday presentation to the union’s House of Delegates, which was obtained by the Tribune, CTU officials encouraged members to bring students on field trips to youth teach-ins or to the citywide May Day rally, or host educational civic events at schools. Kate Armanini, Chicago Tribune, 16 Apr. 2026 May Day demonstrations are typically robust in union-friendly Chicago. ABC News, 10 Apr. 2026 Every year, hundreds if not thousands of Chicagoans participate in May Day protests. Lauren Victory, CBS News, 10 Apr. 2026 The Los Angeles May Day Coalition, made up of more than 50 organizations, is calling for people to join in on a march on International Workers’ Day on May 1. Paris Barraza, USA Today, 26 Mar. 2026 Annually, on Mogen and Kernodle’s birthdays — designated Maddie May Day and Xanapalooza — the foundation encourages people to be kind to others and spend time with loved ones, in remembrance. Kevin Fixler, Idaho Statesman, 5 Mar. 2026 Among them is the wondrous Grace Jones as May Day, the villain Max Zorin’s (Christopher Walken) henchwoman and lover (and an absolute fashion icon, to boot). Sezin Devi Koehler, Entertainment Weekly, 27 Jan. 2026 The protest was organized in collaboration with May Day Strong, a coalition of activists that generally mobilizes for workers’ rights. Nollyanne Delacruz, Mercury News, 14 Jan. 2026 Violence occurred during Seattle May Day protests in 2016, with anarchist groups and other demonstrators clashing with police. Jonathan M. Gitlin, ArsTechnica, 18 Sep. 2025

Word History

Etymology

Communications signal

French m'aider help me

First Known Use

Communications Signal

1927, in the meaning defined above

Noun

13th century, in the meaning defined above

Time Traveler
The first known use of Mayday was in the 13th century

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Cite this Entry

“Mayday.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Mayday. Accessed 17 Apr. 2026.

Kids Definition

Mayday

1 of 2
May·​day mā-ˈdā How to pronounce Mayday (audio)
ˈmā-ˌdā
an international radio signal word used as a distress call

May Day

2 of 2 noun
: May 1 celebrated as a springtime festival and in some countries as Labor Day

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