furious meaning, definition, what is furious: very angry: Learn more. Furious means extremely angry or using a lot of effort or strength. Learn how to use this adjective in different contexts with synonyms, antonyms, and examples from the Cambridge Dictionary. FURIOUS meaning: 1. extremely angry: 2. using a lot of effort or strength: 3. extremely angry: . Learn more. When someone is furious, they are consumed by a powerful and overwhelming feeling of anger or wrath. It is a state characterized by intense emotional energy, often accompanied by visible signs of agitation, such as flushed face, clenched fists, or raised voice.