Mayday
1 of 2communications signal
May·day
ˈmā-ˌdā 
—used as a distress call in international radio-telephone communications
: 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
Sarah D. Wire, USA Today, 2 Sep. 2025
The protest events are often led by labor organizations, including the AFL-CIO, and other advocacy groups such as May Day Strong, Public Citizen and Indivisible.
—Wren Smetana, AZCentral.com, 29 Aug. 2025
The events are led by labor organizations, including the AFL-CIO, and other advocacy groups such as May Day Strong, Public Citizen and Indivisible, USA TODAY reported.
—Jalen Williams, Freep.com, 29 Aug. 2025
That same evening, teen Jules Delaney just barely escapes an attack from a murderer known as the May Day Killer, who wreaks havoc on small towns in the midwest every May 1st.
—Carly Tagen-Dye, People.com, 25 Aug. 2025
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Noun
The events, which are locally organized and tailored to local concerns, are led by labor organizations, including the AFL-CIO, national advocacy groups such as May Day Strong, Public Citizen and Indivisible and dozens on local advocacy groups.
—Sarah D. Wire, USA Today, 2 Sep. 2025
The protest events are often led by labor organizations, including the AFL-CIO, and other advocacy groups such as May Day Strong, Public Citizen and Indivisible.
—Wren Smetana, AZCentral.com, 29 Aug. 2025
The events are led by labor organizations, including the AFL-CIO, and other advocacy groups such as May Day Strong, Public Citizen and Indivisible, USA TODAY reported.
—Jalen Williams, Freep.com, 29 Aug. 2025
That same evening, teen Jules Delaney just barely escapes an attack from a murderer known as the May Day Killer, who wreaks havoc on small towns in the midwest every May 1st.
—Carly Tagen-Dye, People.com, 25 Aug. 2025
Cite this Entry
“Mayday.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Mayday. Accessed 9 Sep. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share