Definition of folia:
(N) :
La Folía (Spanish), or Follies (English), also known as folies d'Espagne (French), La Follia (Italian), and Folia (Portuguese), is one of the oldest remembered European musical themes, or primary material, generally melodic, of a composition, on record.
(N) :
a well-known, simple musical framework that has been used for songs, dances and sets of variations.
(N) :
a genus of larvacean tunicates in the family Oikopleuridae.