Simple Definition of necessity
: something that you must have or do : something that is necessary
: the quality of being necessary
Full Definition of necessity
: in such a way that it cannot be otherwise; also : as a necessary consequence <further changes will occur of necessity>
Examples of necessity
Sunscreen is an absolute necessity for the beach.
food, clothes, and other basic necessities
Getting plenty of rest is a necessity.
Without a car, living close to work is a necessity.
All we took with us on our hiking trip were the bare necessities.
Origin of necessity
Middle English necessite, from Anglo-French necessité, from Latin necessitat-, necessitas, from necesse
First Known Use: 14th century
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