The definition of would be is someone who is trying to become or acting like a specific kind of person that he is not.
(adjective)An example of a would be artist is someone who is trying to get a gallery show and get people to buy his paintings.
See would-be in Webster's New World College Dictionary
adjective
Origin: ME (northern) walde be
See would-be in American Heritage Dictionary 4
adjective
Learn more about would-be