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

(chiefly UK, archaic, euphemistic, usually with the definite article) A place to do the "necessary" business of urination and defecation: an outhouse or lavatory. / (obsolete) Necessity.

plural of necessary

plural of Necessary

A surname.

The state or characteristic of being necessary.

Necessary or indispensable items.

(euphemistic) a toilet, a lavatory (the room, not the fixture)

plural of necessary house

plural of necessary stool