(slang) An exclamation said when surprised, used when in shock or disbelief.

(law) An undertaking to answer for the payment of some debt, or the performance of some contract or duty, of another, in case of the failure of such other to pay or perform; a warranty; a security.

Alternative form of guarantee

A signpost. / (by extension) Anything that provides guidance; a guideline.

The office or position of one acting as a guardian or conservator, especially in a legal capacity.

(music) A guest on a music or other recording. / (television) An actor on a television program who stars in one, or a few, episodes.

Of an actor: to star as a guest. / (sports) Of a player: to play as a guest of another team.

(astronomy) A nova or supernova recorded by the Chinese.

A person or company that provides a guarantee.

The guidance operations needed to launch a spacecraft into orbit or space, navigate in space, and return to Earth or some other body