Necessary; being required.

simple past tense and past participle of need

Needed; necessary; mandatory; requisite; indispensable. / (archaic) Needy; in need.

(slang) Ready money; wherewithal. / (India, chiefly archaic in other dialects) Anything necessary or requisite.

(idiomatic) If necessary; if there is a need.

The property of being needful or necessary; necessity.

Archaic spelling of need.

Archaic spelling of need.

(idiomatic) If need be; if there is a need.

(chiefly UK, auxiliary, indicating absence of necessity) Doesn't have to, don't have to. / (auxiliary, indicating inadvisability) Ought not to.