1. Having or showing great strength, intensity, or determination: _a fierce wind; fierce resistance._
2. Violent or intense in force or degree: _a fierce passion; a fierce attack._
3. Wild or savage in appearance or character: _a fierce animal; a fierce expression._
4. Extremely strong, effective, or powerful: _a fierce drug; a fierce competitor._
5. Characterized by intense activity or excitement: _a fierce battle; a fierce debate._
6. Of strong, bright, or vivid color: _a fierce red; a fierce light._