[ dem-oh ]
See synonyms for demo on
noun,plural dem·os.
  1. 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.

  2. demolition (def. 1): He does flooring and demo for a living.

verb (used with object),dem·oed, dem·o·ing.
  1. to try out or exhibit the use of (a product, process, or the like): You can demo the game without downloading or buying it.

  2. to record (a song) to demonstrate the merits of the song or performer.

Origin of demo

1935–40; by shortening; see -o

Other definitions for Demo (2 of 3)

[ dem-oh ]

noun,plural Dem·os.Informal.
  1. a member of the Democratic Party; Democrat.

Origin of Demo

An Americanism dating back to1785–95

Other definitions for demo- (3 of 3)


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

Origin of demo-

<Greek dēmo-, combining form of dêmos Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use demo in a sentence

British Dictionary definitions for demo (1 of 2)


/ (ˈdɛməʊ) /

nounplural -os informal
    • a demonstration record or tape, used for audition purposes

    • a demonstration of a prototype system

British Dictionary definitions for demo- (2 of 2)


combining form
  1. indicating people or population: demography

Origin of demo-

from Greek dēmos

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