1 : marked by extreme anger; "the enraged bull attached"; "furious about the accident"; "a furious scowl"; "infuriated onlookers charged the police who were beating the boy"; "could not control the maddened crowd"
2 : (of the elements) as if showing violent anger; "angry clouds on the horizon"; "furious winds"; "the raging sea"
3 : excessively agitated; distraught with fear or other violent emotion; "frantic with anger and frustration"; "frenetic screams followed the accident"; "a frenzied look in his eye"
4 : marked by extreme and violent energy; "a ferocious beating"; "fierce fighting"; "a furious battle"
