Articles of clothing or jewelry which hang from the neck, such as ties or necklaces.

Used other than figuratively or idiomatically: see pearl, necklace. / (vulgar, slang) A sexual act whereby semen is ejaculated onto a partner's neck.

Alternative form of pearl necklace

A necklace. / A type of ornament worn tightly about the neck.

Having a very thin neck. / (idiomatic, US, derogatory) Insubstantial; weak.

(informal) A person with a very thin neck. / (idiomatic, US, derogatory) An insubstantial person; a weakling.

(idiomatic) To take a risk, putting oneself in a vulnerable position.

(medicine, biochemistry) Any of several polypeptide hormones, produced by macrophages, that can destroy some cancer cells.

(logic) A statement Q in relation to statement P such that P implies Q.

Alternative form of necessity is the mother of invention