A requirement for something; something needed.
I've always tried to have few needs beyond food, clothing and shelter.
Lack of means of subsistence; poverty; indigence; destitution.
To have an absolute requirement for.
Living things need water to survive.
To want strongly; to feel that one must have something.
After ten days of hiking, I needed a shower and a shave.
(modal verb) To be obliged or required (to do something).
You need not go if you don't want to.
To be required; to be necessary.
To be necessary (to someone).