noun

• One who loves and cares for another person in a romantic way; a sweetheart, love, soulmate, boyfriend, girlfriend, or spouse.
• A sexual partner, especially one with whom someone is having an affair.
• A person who loves something.
• (West Country, with "my") An informal term of address for any friend.
• Obsolete form of louver. [A type of turret on the roof of certain medieval buildings designed to allow ventilation or the admission of light.]