Is Everyone and Author?

The definition of Author is the person who writes books as a profession as a noun.

To write; be the author of or originate; create a design for as a verb.

Dictionary.reference.com

For this definitions I think that everyone can be an author in some moment of the life, I am the author of my life because I am the designer, when I write a letter to my husband, a poem or short phrase communicating something to someone or doing my homework how I am doing right now, I am the author of what I am writing for my English 101 assignment, but a professional author is something else, I never tried to write a novel or any article in a newspaper and less in English, (my first language is Spanish).

Another way in my point of view is when you are talking or doing a locution in from of a public about some specific topic or theme are you expressing your ideas, thinks in your own words you are an author but not a professional one.