1.Definition: full of spirit; full of life
"A vital and charismatic leader"
2.Definition: manifesting or characteristic of life
"A vital, living organism", "Vital signs"
3.Definition: performing an essential function in the living body
"Vital organs", "Blood and other vital fluids", "The loss of vital heat in shock", "A vital spot"
4.Definition: urgently needed; absolutely necessary
"Vital for a healthy society", "Of vital interest"