Meaning

noun an energetic style

noun a healthy capacity for vigorous activity

noun (biology) a hypothetical force (not physical or chemical) once thought by Henri Bergson to cause the evolution and development of organisms

originFrom vital + -ity, from Middle French vitalité, from Latin vitalitas (“vital force, life”), from vitalis (“vital”); see vital.

Etymology from Wiktionary, CC BY-SA 3.0