noun 2. active or healthy growth ⇒ the vigor of a plant 3. intensity, force, or energy ⇒ the vigor of her denial
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'vigor'ME vigour < OFr < L vigor < vigere, to be strong < vegere: see wake1