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

Compared to healthy people, levels of eMTBR-tau243 were higher in those with advanced CTE, said study coauthor Chihiro Sato, a WashU assistant neurology professor. — ABC News, 13 Nov. 2026

Meanwhile, coauthor David Hoffman reads the author’s note, and the rest of the audiobook is narrated by Mack Sanderson. — Marina Watts, Entertainment Weekly, 10 Nov. 2026

To confirm this estimate, the sample was also processed via a new aging method developed by study coauthor Hayward Melton, a doctoral student at the California Institute of Technology. — Jacopo Prisco, CNN Money, 6 Nov. 2026

But David Neumark, a UC Irvine economist and coauthor of the PPIC study, said the findings indicate California could be ripe for a broad regulatory review. — Los Angeles Times, 22 Oct. 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