(countable and uncountable, plural vigours)
- Active strength or force of body or mind; capacity for exertion, physically, intellectually, or morally; force; energy.
- (biology) Strength or force in animal or force in animal or vegetable nature or action.
- A plant grows with vigour.
- Strength; efficacy; potency.
Vigour and its derivatives commonly imply active strength, or the power of action and exertion, in distinction from passive strength, or strength to endure.
From Middle English, from Anglo-Norman vigour, from Old French vigor, from Latin vigor, from vigeo (“thrive, flourish"), from Proto-Indo-European.
Related to vigil, and more distantly compare vis and vital, from similar Proto-Indo-European roots and meanings (lively, power, life), via Latin.