necessity /nɪˈsɛsəti/ noun
plural necessities
plural necessities
Learner's definition of NECESSITY
[count] : something that you must have or do : something that is necessary
[noncount] formal : the quality of being necessary usually + of or for

by necessity

or out of necessity
: because of conditions that cannot be changed

make a virtue (out) of necessity

see virtue

necessity is the mother of invention

see 1mother

of necessity

used to say that something must happen or must be the way it is
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