Possible Definitions:
1. Vital (a.) Belonging or relating to life, either animal or vegetable; as, vital energies; vital functions; vital actions.
2. Vital (a.) Contributing to life; necessary to, or supporting, life; as, vital blood.
3. Vital (a.) Containing life; living.
4. Vital (a.) Being the seat of life; being that on which life depends; mortal.
5. Vital (a.) Very necessary; highly important; essential.
6. Vital (a.) Capable of living; in a state to live; viable.
7. Vital (n.) A vital part; one of the vitals.