adj sense 1c
>characterized by or conforming to the technical or ethical standards of a profession
>"did a competent, professional job"
>exhibiting a courteous, conscientious, and generally businesslike manner in the workplace professional behavior/attire
>"I thought the whole meeting was going to fall apart but you rescued it like a true professional!"
As you can see there's more than 1 sense for the word, I didn't just make it up, it's a well established use of the word.
The definition you refer to is the 2nd sense:
>a: participating for gain or livelihood in an activity or field of endeavor often engaged in by amateurs
> "a professional golfer/poker player"
>"Few think of Idaho as fertile ground for developing professional baseball players."
>b: having a particular profession as a permanent career
>"a professional soldier"
>c: engaged in by persons receiving financial return
> "plays professional football/sports/poker"
adj sense 1c
>characterized by or conforming to the technical or ethical standards of a profession
>"did a competent, professional job"
>exhibiting a courteous, conscientious, and generally businesslike manner in the workplace professional behavior/attire
>"I thought the whole meeting was going to fall apart but you rescued it like a true professional!"
As you can see there's more than 1 sense for the word, I didn't just make it up, it's a well established use of the word.
The definition you refer to is the 2nd sense:
>a: participating for gain or livelihood in an activity or field of endeavor often engaged in by amateurs
> "a professional golfer/poker player"
>"Few think of Idaho as fertile ground for developing professional baseball players."
>b: having a particular profession as a permanent career
>"a professional soldier"
>c: engaged in by persons receiving financial return
> "plays professional football/sports/poker"