(1):

(n.) Inclined to favor one party in a cause, or one side of a question, more then the other; baised; not indifferent; as, a judge should not be partial.

(2):

(n.) Having a predelection for; inclined to favor unreasonably; foolishly fond.

(3):

(n.) Pertaining to a subordinate portion; as, a compound umbel is made up of a several partial umbels; a leaflet is often supported by a partial petiole.

(4):

(n.) Of, pertaining to, or affecting, a part only; not general or universal; not total or entire; as, a partial eclipse of the moon.