Also found in: Thesaurus, Encyclopedia, Wikipedia.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
indicating two: duotone.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
du•o(ˈdu oʊ, ˈdyu oʊ)
n., pl. du•os.
2. two persons commonly associated with each other; couple.
3. two things ordinarily placed or found together; a pair: a duo of lovebirds.
[1580–90; < Italian < Latin: two]
a combining form meaning “two”: duotone.
[comb. form of Greek dýo, Latin duo two]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.