The way that author is spelled in most English speaking countries. Because of American cultural dominance, the useful information is under the American spelling, author.
An author is the creator or originator of any written work such as a book or play, and is also considered a writer. More broadly defined, an author is “the person who originated or gave existence to anything” and whose authorship determines responsibility for what was created.
obsolete spelling of author
The originator or creator of a work, especially of a literary composition.
“The copyright of any original writing belongs initially and properly to its author.”
“Have you read any Corinthian authors?”
Someone who writes books for a living.
One’s authority for something: an informant.