au·thor / ˈô[unvoicedth]ər/ (abbr.: auth.) • n. a writer of a book, article, or report. ∎ someone who writes books as a profession. ∎ the writings of such a person: I had to read authors I disliked. ∎ fig. an originator or creator of something, esp. a plan or idea: the authors of the peace plan.• v. [tr.] be the author of (a book or piece of writing): she has authored several articles on wildlife. ∎ fig. be the originator of; create: the concept has been authored largely by insurance companies.DERIVATIVES: au·tho·ri·al / ôˈ[unvoicedth]ôrēəl/ adj.ORIGIN: Middle English (in the sense ‘a person who invents or causes something’): from Old French autor, from Latin auctor, from augere ‘increase, originate, promote.’ The spelling with th arose in the 15th cent., and perhaps became established under the influence of authentic.