1. Active strength of body or mind
   "His vigor was evident in his enthusiastic approach to the project";
   - vigour [Brit, Cdn], dynamism, heartiness
    
2. Forceful exertion
   "he plays tennis with great vigor";
   - energy, vigour [Brit, Cdn], zip [informal]
    
3. An imaginative lively style (especially style of writing)
   "his writing conveys great vigor";
   - energy, muscularity, vigour [Brit, Cdn], vim

Derived forms: vigors

Type of: force, forcefulness, life, liveliness, spirit, sprightliness, strength

Encyclopedia: Vigor, Simon