NECESSITY

noun the condition of being needy or necessitous; pressing need; indigence; want.

2. necessity ·noun that which is necessary; a necessary; a requisite; something indispensable;

— often in the plural.

3. necessity ·noun the quality or state of being necessary, unavoidable, or absolutely requisite; inevitableness; indispensableness.

4. necessity ·noun that which makes an act or an event unavoidable; irresistible force; overruling power; compulsion, physical or moral; fate; fatality.

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