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

Staci Hill is the cofounder of Gooseberry Bridge Farm, and coauthor of The Preserver’s Garden. —Peg Aloi, The Spruce, 25 Apr. 2026

The research team, which includes study coauthor Ximena Nelson, a professor of animal behavior at the University of Canterbury in New Zealand, systematically tracked social interactions, aggressive encounters, feeding access, grooming behavior and stress hormone levels. —Samantha Agate, Charlotte Observer, 22 Apr. 2026

Lower-potency products are typically 5 to 10 milligrams per gram of THC, study coauthor Tom Freeman, a professor in the department of psychology and director of the Addiction and Mental Health Group at the University of Bath in the United Kingdom, told me in an email. —Sandee Lamotte, CNN Money, 20 Apr. 2026

Laks Srinivasan, coauthor of that report, told me that finance chiefs are uniquely positioned to define, evaluate, fund, and measure AI initiatives, then apply that framework across the company. —Sheryl Estrada, Fortune, 7 Apr. 2026

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