9 Grammatical Pitfalls


[doo-oh, dyoo-oh] /ˈdu oʊ, ˈdyu oʊ/
noun, plural duos.
Music. duet.
two persons commonly associated with each other; couple.
two animals or objects of the same sort; two things ordinarily placed or found together; a pair:
a duo of lovebirds.
Origin of duo
1580-90; < Italian < Latin: two


a combining form meaning “two,” used in the formation of compound words:
combining form of Greek dýo, Latin duo two Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for duo
  • The narrative shifts constantly between the perspectives of the travelling duo.
  • Pecorino's fame has garnered the duo some unusual privileges.
  • The duo of smartphones were used to test and investigate how humans and robots can coexist in space more efficiently.
  • Genetic variation and natural selection are evolution's powerful duo.
  • Alas, it is not clear whether the duo will actually compete.
  • They led the duo to binge on securities backed by shoddily underwritten loans.
  • To that end, the duo want to get their hands on the physical goods as soon as they're ready.
  • Suddenly, no one had any idea what the dynamic duo had in mind.
  • Of course, whatever outfit is chosen to take this on will have to wrestle with the universe's daunting duo-time and distance.
  • The rest of the crowd agreed, voting the duo's unusual offering to top honors.
British Dictionary definitions for duo


noun (pl) duos, dui (ˈdjuːiː)
  1. a pair of performers
  2. another word for duet
a pair of actors, entertainers, etc
(informal) a pair of closely connected individuals
Word Origin
C16: via Italian from Latin: two


combining form
indicating two: duotone
Word Origin
from Latin
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 duo

1580s, "song for two voices," via either Italian or French, from Latin duo "two" (see two). Meaning "two people" (especially as an entertainment team) attested by 1887.

Online Etymology Dictionary, © 2010 Douglas Harper
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