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Noun: necessity  ni'sesitee
  1. The condition of being essential or indispensable
     
  2. Anything indispensable
    "food and shelter are necessities of life"
    - essential, requirement, requisite, necessary

Derived forms: necessities

See also: necessary, necessitate, necessitous, unnecessary, unneeded

Type of: demand, need, thing

Encyclopedia: Necessity