the GNU version of the Collaborative International Dictionary of English
adjective-and-adverb. With great force or vigor; vehemently.
The Century Dictionary and Cyclopedia
Furious; vehement: used in music.
n. A violent, raging, furious person.
Word Usage
"“Well, I tried to sell him—though Consuela would have been muy furioso—and then one woman who came to look at him told me about this famous bird sanctuary on Maui.”"