Pronunciation: (friv'u-lus), [key]
1. characterized by lack of seriousness or sense: frivolous conduct.
2. self-indulgently carefree; unconcerned about or lacking any serious purpose.
3. (of a person) given to trifling or undue levity: a frivolous, empty-headed person.
4. of little or no weight, worth, or importance; not worthy of serious notice: a frivolous suggestion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.