—n.
1 a strong, esp. unreasoning, supporter of a party, cause, etc.
2 Mil. a guerrilla in wartime.
—adj.
1 of or characteristic of partisans.
2 loyal to a particular cause; biased.
Derivatives:
partisanship n.
Etymology: F f. It. dial. partigiano etc. f. parte PART
Useful english dictionary. 2012.