2. The capacity for natural growth and survival, as of plants or animals.
3. Strong feeling; enthusiasm or intensity.
4. Legal effectiveness or validity.
[Middle English, from Old French, from Latin, from vigre, to be lively; see weg- in Indo-European roots.]
Synonyms: vigor, dash1, punch2, verve, vim, vitality These nouns denote a quality of spirited force or energy: intellectual vigor; played the piano with dash; an editorial with real punch; painted with verve; arguing with his usual vim; a decreased mental vitality.