The position or authority of a master; dominion; command; supremacy; superiority.
Superiority in war or competition; victory; triumph; preeminence.
The act or process of mastering; the state of having mastered; expertise.
The status, methods, character or standards expected of a professional or of a professional organization, such as reliability, discretion, evenhandedness, and fair play.
The use of professionals rather than amateurs in any sport etc.