Definition of Vital

Adjective: vital vI-t(u)l

Urgently needed; absolutely necessary
"vital for a healthy society"; "of vital interest";
- critical
Performing an essential function in the living body
"blood and other vital fluids"; "the loss of vital heat in shock"; "a vital spot"; "vital organs";
- life-sustaining
Full of spirit
"a vital and charismatic leader";
- full of life, lively
Manifesting or characteristic of life
"a vital, living organism"; "vital signs"