noun
- active strength or force.
- healthy physical or mental energy or power; vitality.
- energetic activity; energy; intensity: The economic recovery has given the country a new vigor.
- force of healthy growth in any living matter or organism, as a plant.
- active or effective force, especially legal validity.
c.1300, from Anglo-French vigour, Old French vigor, from Latin vigorem (nominative vigor) “liveliness, activity, force,” from vigere “be lively, flourish, thrive,” from PIE *wog-/*weg- “be lively or active” (see vigil).
see vim and vigor.