necessity

noun

1. 1

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

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

2. 2

   The condition of being needy; desperate need; lack

3. 3

   Something necessary; a requisite; something indispensable.

   “A tent is a necessity if you plan on camping.”

4. 4

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

5. 5

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

6. 6

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

   “doctrine of necessity”

7. 7

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