coauthor

noun

co·​au·​thor (ˌ)kō-ˈȯ-thər 

variants or co-author

plural coauthors or co-authors

: one who collaborates with another person in authoring a literary or dramatic work, a document, a legislative bill, etc.

coauthors of many books and plays

the coauthors of new legislation

coauthor transitive verb

or co-author

coauthored or co-authored; coauthoring or co-authoring

… he coauthored legislation … requiring the publication on the Internet of the cost of all federal contracts, grants, and congressional "earmarks,"…

—Michael Tomasky

a co-authored book

coauthorship

(ˌ)kō-ˈȯ-thər-ˌship 

noun

or co-authorship

… accepting coauthorship on studies to which they did not significantly contribute.

—Mary Murray

Examples of coauthor in a Sentence

Recent Examples on the Web

Dr Michele Menegon, a coauthor and conservationist, warns that ongoing deforestation, mining, and climate change are putting these rare toads at serious risk. —Aamir Khollam, Interesting Engineering, 6 Nov. 2025

The site is not immediately obvious on the ground, although the main platform would have once been almost 15 meters (50 feet) high, said Verónica Vazquez Lopez, a lecturer in Mesoamerican archaeology at University College London and coauthor of the study. —Katie Hunt, CNN Money, 5 Nov. 2025

In their journal article, Brooks and his coauthors point out that cannabis smoke — which users often inhale more deeply than tobacco smoke, without filtration — contains compounds known to damage DNA and promote inflammation and tumor growth. —Tom Gavin, EverydayHealth.com, 4 Nov. 2025

That’s the big question that physicist Daniel Whiteson and his coauthor Andy Warner explore in their new book, Do Aliens Speak Physics? —Big Think, 29 Oct. 2025

Word History

First Known Use

1827, in the meaning defined above

Rhymes for coauthor

• author

Kids Definition

coauthor

noun

co·​au·​thor

(ˈ)kō-ˈȯ-thər

: an author who works with another author