1. professional tennis playing tennis for money
  2. professionalization the social process whereby people come to engage in an activity for pay or as a means of livelihood
  3. professionalisation the social process whereby people come to engage in an activity for pay or as a means of livelihood
  4. professional relation the relation that exists when one person requests and is granted professional help from a qualified source
  5. professional organization an organization of and for professional people
  6. professional association an association of practitioners of a given profession
  7. professional organisation an organization of and for professional people
  8. professional dancer a performer who dances professionally
  9. professional boxing boxing for money
  10. personal equation variability attributable to individual differences
  11. dictionary a reference book containing an alphabetical list of words
  12. professional basketball playing basketball for money
  13. professional football football played for pay
  14. professional tennis player someone who earns a living playing or teaching tennis
  15. physical education training in the development of and care for the human body
  16. professional person a person engaged in one of the learned professions
  17. professional of or relating to or suitable as an occupation
  18. professional baseball playing baseball for money
  19. proficient having or showing knowledge and skill and aptitude
  20. professionalism the expertness characteristic of a business person