Having a peculiar, acrid, biting taste, like that of wormwood or an infusion of hops; as, a bitter medicine; bitter as aloes.

Causing pain or smart; piercing; painful; sharp; severe; as, a bitter cold day.

Characterized by sharpness, severity, or cruelty; harsh; stern; virulent; as, bitter reproach.

Flavor characteristic of butter attributable to the action of certain microorganisms or enzymes in the cream before churning, or certain types of feeds and late lactation.