(1):

(a.) Adherent to a party or faction; especially, having the character of blind, passionate, or unreasonable adherence to a party; as, blinded by partisan zeal.

(2):

(n.) A kind of halberd or pike; also, a truncheon; a staff.

(3):

(n.) An adherent to a party or faction; esp., one who is strongly and passionately devoted to a party or an interest.

(4):

(n.) Any member of such a corps.

(5):

(n.) The commander of a body of detached light troops engaged in making forays and harassing an enemy.

(6):

(a.) Serving as a partisan in a detached command; as, a partisan officer or corps.