being such in part only; not total or general; incomplete

partial blindness; a partial payment of a debt.

biased or prejudiced in favor of a person, group, side, etc., over another, as in a controversy

a partial witness.

pertaining to or affecting a part.

being a part; component; constituent.

Botany . secondary or subordinate

a partial umbel.

Bridge . part-score.

Acoustics, Music . partial tone. ?

partial to

having a liking or preference for; particularly fond of

I'm partial to chocolate cake.

noun

favoritism , partiality , preference