N-COUNT
（英國國王或女王授予的）爵士頭銜，騎士頭銜，爵士稱號，騎士稱號（其名前冠以Sir）
A knighthood is a title that is given to a man by a British king or queen for his achievements or his service to his country. A man who has been given a knighthood can put 'Sir' in front of his name instead of 'Mr'.