[dem-oh] Informal.
noun, plural demos.
demonstration ( defs 4, 6 ).
demonstrator ( def 5 ).
a recording of a new song or of one performed by an unknown singer or singing group, distributed to disc jockeys, recording companies, etc., to demonstrate the merits of the song or performer.
demolition ( def 1 ): He does flooring and demo for a living.
verb (used with object), demoed, demoing.
to try out or exhibit the use of (a product, process, or the like): You can demo the game without downloading or buying it.
to record (a song) to demonstrate the merits of the song or performer.

1935–40; by shortening; see -o Unabridged


noun, plural Demos. Informal.
a member of the Democratic Party; Democrat.

1785–95, Americanism


a combining form occurring in loanwords from Greek, where it meant “people” (democratic ); on this model, used in the formation of compound words (demography ).

< Greek dēmo-, combining form of dêmos Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
demo (ˈdɛməʊ)
n , pl -os
1.  short for demonstration
2.  a.  a demonstration record or tape, used for audition purposes
 b.  a demonstration of a prototype system
3.  (US) short for demonstrator

demo- or (before a vowel) dem-
combining form
indicating people or population: demography
[from Greek dēmos]
dem- or (before a vowel) dem-
combining form
[from Greek dēmos]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

short for demonstration (tape, disc, etc.). Music recording given out for promotional purposes, 1963. The word was earlier used to mean public political demonstrations (1936).
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

demo definition

/de'moh/ 1. A demonstration of a product, often of an early version or prototype. A demo is a far more effective way of inducing bugs to manifest themselves than any number of test runs, especially when important people are watching.
2. demo version.
3. A program written to demonstrate the programmer's coding ability and/or the power of the computer it runs on. Such demos are nearly always written in machine code and traditionally feature scrolling text about the author, his friends, his code and anything else he fancies and animated graphics.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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American Heritage
Abbreviations & Acronyms
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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