coauthor

[ koh-aw-ther, koh-aw- ]

/ koʊˈɔ θər, ˈkoʊˌɔ- /

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noun

one of two or more joint authors.

verb (used with object)

to write in joint authorship.

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The rainy weather could not ________ my elated spirits on my graduation day.

affect

effect

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Origin of coauthor

First recorded in 1860–65; co- + author

How to use coauthor in a sentence

Woodward has authored or coauthored 17 national nonfiction bestsellers.
The Hero Summit 2013 Speakers||September 10, 2013|DAILY BEAST
At just 14, Swartz coauthored RSS, which helped transform the Web from a static to a dynamic destination.
The Swartz Family’s Statement and More Reactions to the Death of Aaron Swartz||January 13, 2013|DAILY BEAST
A student of Gutiérrez, Müller even coauthored a book with him about the controversial movement.
Pope Benedict XVI Appoints Catholic Church’s New Top Cop|Barbie Latza Nadeau|July 4, 2012|DAILY BEAST
Gingrich has coauthored four novels about the North-South clash.
Gingrich Might Withdraw From Presidential Race for Right Appointment|Michelle Cottle|March 21, 2012|DAILY BEAST

British Dictionary definitions for coauthor

coauthor

/ (kəʊˈɔːθə) /

noun

a person who shares the writing of a book, article, etc, with another

verb

(tr) to be the joint author of (a book, article, etc)

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