Definitions
1.nounThe quality or state of being necessary, unavoidable, or absolutely requisite."I bought a new table out of necessity. My old one was ruined."
2.nounThe condition of being needy; desperate need; lack
3.nounSomething necessary; a requisite; something indispensable."A tent is a necessity if you plan on camping."
4.nounSomething which makes an act or an event unavoidable; an irresistible force; overruling power
5.nounThe negation of freedom in voluntary action; the subjection of all phenomena, whether material or spiritual, to inevitable causation; necessitarianism.
6.nounGreater utilitarian good; used in justification of a criminal act."doctrine of necessity"
7.noun(in the plural) Indispensable requirements (of life).