Meaning

• The quality or state of being necessary, unavoidable, or absolutely requisite.

  "I bought a new table out of necessity. My old one was ruined."

• The condition of being needy; desperate need; lack

• Something necessary; a requisite; something indispensable.

  "A tent is a necessity if you plan on camping."

• Something which makes an act or an event unavoidable; an irresistible force; overruling power

• The negation of freedom in voluntary action; the subjection of all phenomena, whether material or spiritual, to inevitable causation; necessitarianism.

• Greater utilitarian good; used in justification of a criminal act.

  "doctrine of necessity"

• (in the plural) Indispensable requirements (of life).