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[mon-oh] /ˈmɒn oʊ/
noun, Informal.
infectious mononucleosis.
Origin of mono1
by shortening


[mon-oh] /ˈmɒn oʊ/
monophonic (def 2).
by shortening


a combining form meaning “alone,” “single,” “one” (monogamy); specialized in some scientific terms to denote a monomolecular thickness (monolayer) and adapted in chemistry to apply to compounds containing one atom of a particular element (monohydrate).
Also, especially before a vowel, mon-.
< Greek, combining form of mónos alone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for mono
  • Given that the software to do this is built in to the app itself, you could use any old stereo to mono splitter to do the job.
  • Trouble is, only certain mono recordings encode music laterally, in the left-to-right axis of the groove.
  • Second, our academic format stems from the days of typewriters, which produced mono-spaced type.
  • mono or polycrystalline panels produce much more wattage per square foot.
  • He said he was first told he had mono, but that diagnosis didn't seem right to him.
  • Types of craft available include catamarans and mono-hull yachts with up to three cabins.
  • They would set up a mono tape recorder and a single microphone and knock out a bunch of new songs with a small band.
  • We gave each other mono that semester and shared, for a summer, your pink-handled golf clubs.
British Dictionary definitions for mono


short for monophonic
monophonic sound; monophony


combining form
one; single: monochrome, monorail
indicating that a chemical compound contains a single specified atom or group: monoxide
Word Origin
from Greek monos
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 mono

1959 as a shortening of monophonic; earlier used among printers for "monotype machine" (c.1925) and generally for monochrome (motorcar, etc.), 1940s. From 1964 as short for mononucleosis.


word-forming element meaning "one, alone; containing one (atom, etc.)," from Greek mono-, comb. form of monos "single, alone," from PIE root *men- "small, isolated" (cf. Greek manos "rare, sparse," Armenian manr "thin, slender, small," and perhaps English minnow).

Online Etymology Dictionary, © 2010 Douglas Harper
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mono in Medicine

mono mon·o (mŏn'ō)
Infectious mononucleosis.

mono- or mon-

  1. One; single; alone: monomorphic.

  2. Monomolecular; monatomic: monolayer.

  3. Containing one atom, molecule, or group: monomer.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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mono in Science
A prefix that means "one, only, single," as in monochromatic, having only one color. It is often found in chemical names where it means "containing just one" of the specified atom or group, as in carbon monoxide, which is carbon attached to a single oxygen atom.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for mono


  1. Mononucleosis (1960s+ Students)
  2. A monophonic recording (1950s+)

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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mono in Technology
software, .NET
An open source .NET framework for Unix.
Mono Home (
The Free On-line Dictionary of Computing, © Denis Howe 2010
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Related Abbreviations for mono


  1. monaural
  2. mononucleosis
  3. monophonic
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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