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[mey-oh] /ˈmeɪ oʊ/
noun, Informal.
Origin of mayo
by shortening; cf. -o


[mey-oh] /ˈmeɪ oʊ/
Charles Horace, 1865–1939, and his brother William James, 1861–1939, U.S. surgeons.
a county in NW Connaught province, in the NW Republic of Ireland. 2084 sq. mi. (5400 sq. km). County seat: Castlebar. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for mayo
Contemporary Examples
Historical Examples
  • We inspected a farm in mayo where the family and the cow lived in the same room, but it was kept remarkably clean and tidy.

    One Irish Summer William Eleroy Curtis
  • Captain mayo had been prepared for these trips, although he had not been informed of the reason.

    Blow The Man Down Holman Day
  • "You'd better ask the man who gave that packet to your daughter," suggested mayo.

    Blow The Man Down Holman Day
  • mayo was informed curtly that there was no need of an interview.

    Blow The Man Down Holman Day
  • "I didn't feel like wasting much time, considering what was promised me," stammered mayo, not yet sure of himself.

    Blow The Man Down Holman Day
British Dictionary definitions for mayo


a county of NW Republic of Ireland, in NW Connacht province, on the Atlantic: has many offshore islands and several large lakes. County town: Castlebar. Pop: 117 446 (2002). Area: 5397 sq km (2084 sq miles)


a family of US medical practitioners. They pioneered group practice and established (1903) the Mayo Clinic in Rochester, Minnesota. Foremost among them were William Worrall Mayo (1819–1911), his sons William James Mayo (1861–1939) and Charles Horace Mayo (1865–1939), and Charles's son, Charles William Mayo (1898–1968)
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
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Word Origin and History for mayo

shortened form of mayonnaise, first attested c.1930.

Online Etymology Dictionary, © 2010 Douglas Harper
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mayo in Medicine

Mayo Ma·yo (mā'ō), William James. 1861-1939.

American surgeon who with his brother Charles Horace Mayo (1865-1939) founded the Mayo Clinic, a renowned medical center in Rochester, Minnesota.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for mayo



An expert; an authority; a connoisseur: growing clientele of pizza mavins/A real advertising mavin must have thought that up

[1960s+; fr Yiddish fr Hebrew, ''understanding'']

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Related Abbreviations for mayo


The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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