Definition of megrim

• n. - A kind of sick or nevrous headache, usually periodical and confined to one side of the head.
• n. - A fancy; a whim; a freak; a humor; esp., in the plural, lowness of spirits.
• n. - A sudden vertigo in a horse, succeeded sometimes by unconsciousness, produced by an excess of blood in the brain; a mild form of apoplexy.
• n. - The British smooth sole, or scaldfish (Psetta arnoglossa).