LIVIANA

adj. fickle, frivolous; lewd

(Song and dance form) This song evolved from being a Tona Liviana, a song without accompaniment or compas, to a style with guitar accompaniment performed to the compas of Siguiriyas.

= lightweight [light-weight].
Ex: David Niven's amusing but very lightweight autobiography 'The Moon's a Balloon' is an excellent example of this phenomenon and it was impossible for the original hardback publishers to forecast the tremendous success of this book.