Partisan — Defs

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

1.
An adherent to a party or faction; esp., one who is strongly and passionately devoted to a party or an interest.
“Both sides had their partisans in the colony.” — Jefferson.
2.
The commander of a body of detached light troops engaged in making forays and harassing an enemy.(Mil.)

02 a. Adherent to a party or faction; especially, having the character of blind, passionate, or unreasonable adherence to a party; as, blinded by…

1.
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.
Serving as a partisan in a detached command; as, a partisan officer or corps.(Mil.)

Phrases & compounds

Partisan ranger — a member of a partisan corps.

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

1.
A kind of halberd or pike; also, a truncheon; a staff.
“And make him with our pikes and partisans a grave.” — Shak.