pro ‧ tag ‧ o ‧ nist /prəʊˈtæɡənəst, prəʊˈtæɡənɪst $ proʊ-/ BrE AmE noun [countable] formal
[ Date: 1600-1700 ; Language: Greek ; Origin: protagonistes , from agonistes 'competitor, actor' ]
1 . the most important character in a play, film, or story SYN main character
2 . one of the most important people taking part in a competition, battle, or struggle:
the main protagonists in the conflict
3 . one of the most important supporters of a social or political idea
protagonist of
a protagonist of educational reform