As a Noun: 1. Someone who has a job that requires special training and has a fairly high status, for example the job of a doctor or lawyer. English = professional. 2. A type of job that requires special training and that has a fairly high status, for example the job of doctor or lawyer. English = profession. 3. The skilful way in which someone does a job. English = professionalism. As a Verb or Adjective: 1. To do something to earn money rather than as a hobby. English = (be) a professional. 2. To have a job that requires special training and has a fairly high status. English = (be) a professional. 3. To do a job or task in a skilful way and to a very high standard. English = (be) professional.