necessary🔊

Required, essential, whether logically inescapable or needed in order to achieve a desired result or avoid some penalty. +

Unavoidable, inevitable. +

(obsolete) Determined, involuntary: acting from compulsion rather than free will.

(usually with the definite article) A place to do the "necessary" business of urination and defecation: an outhouse or lavatory. +

(obsolete) Necessity.