Definitions
1.NounThe originator or creator of a work, especially of a literary composition; or, one of the creators of a collaborative work."The copyright of any original writing belongs initially and properly to its author.; Have you read any Corinthian authors?; This paper has three authors."
2.NounThe initial owner of the copyright to a work, especially a work made for hire or a work of corporate authorship."The author named on the copyright registration for the Android robot is Google Inc."
3.NounSomeone who writes books for a living.
4.NounPrincipal; the primary participant in a crime.
5.NounOne's authority for something: an informant.
6.NounThe creator or cause of anything.
7.VerbTo create a work as its author.