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

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

3. (n.) Any member of such a corps.

4. (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.

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

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