As a Noun: 1. A person who has a job that requires special training and has a fairly high status. English = professional. 2. A type of job that requires special training and has a fairly high status, such as the job of a doctor or lawyer. English = profession. As a Verb or Adjective: 1. Of or relating to a person's work. English = (be) professional. 2. Of a person, to have a job that requires special training and that has a fairly high status. English = (be) professional. 3. To be of a very high standard. English = (be) professional. 4. To do a job to earn money rather than as a hobby. English = (be) professional.