Great definition. But what are your skills in particular, what do you do that makes you a professional?
Personally I'm a Java (let's say a back-end in general) developer, and although I'm not that experienced, I will try to mentor when I know something and have a better domain knowledge. On the other hand, I'm always eager to listen and learn from seniors. This is what characterizes me as an individual.
As a team member, I will try to facilitate the workflow (let's say in an Agile environment, during a sprint) and accommodate my colleagues in whatever we might need as a team to deliver a quality feature.
As you might have guessed, work in progress!
I could say almost the same for myself.
I'm a frontend developer with CSS and HTML skills. Being professional freelancer, I always try to deliver code of the highest quality within arranged deadlines whether I work alone or as a part of the team.
This could be my definition of a professional.
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