A relation symbol that indicates that two expressions are different; the ≠ symbol.

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

(mathematics, logic) An operation on logical values that changes true to false, and false to true.

(Of a place, position etc) Not destined or planning to remain

Used to indicate that something is forbidden.

(idiomatic) Used to apologize for a possibly impolite statement one is making.

(euphemistic, sometimes humorous) Something visually unappealing, ranging from mildly unattractive to utterly disgusting in appearance.

(US) A shop selling miscellanea.

(idiomatic) not exactly but slightly

(US, idiomatic) worthless, lacking in value.