necessity
noun
plural necessities
Definition of necessity
1
: the quality or state of being necessary
He questioned the necessity for the change.
2a
: pressure of circumstance
The plane was compelled by necessity to change its course.
b
: physical or moral compulsion
did it, not because he wanted to, but by necessity
c
: impossibility of a contrary order or condition
submittimg to the necessity imposed by the physical laws of the universe
3
: the quality or state of being in need
especially
: poverty
had come to help them in their necessity
4a
: something that is necessary : requirement
Many families could not afford the bare necessities of life.
b
: an urgent need or desire
When his father collapsed, an ambulance became a necessity.
of necessity
: in such a way that it cannot be otherwise
also
: as a necessary consequence
further changes will occur of necessity