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

For the new study, coauthors Taku Shimada and Yuji Tanaka — both citizen scientists in Tokyo — each raised an ant colony and introduced parasitic queens. —CNN Money, 17 Nov. 2025

Cynthia Graham, PhD, study coauthor, senior scientist, and professor of gender studies at Indiana University’s Kinsey Institute, notes that more research is needed to explore this question. —Tom Gavin, EverydayHealth.com, 17 Nov. 2025

Study coauthor Yi Yang of Tsinghua University in China initially learned about its sighting shortly after arriving in San Francisco following a transpacific flight. —Andrew Paul, Popular Science, 13 Nov. 2025

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

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