/ Dictionary / Index V vital function: Meaning and Definition of Find definitions for: vi'tal func'tion Pronunciation: [key] — Physiol. Physiol. any function of the body that is essential for life. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vital force Vitalian Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language