(idiomatic) Someone who is down and out.

plural of down-and-outer

An extremist or radical.

(astronomy) Any planet of the Solar System whose orbit is located beyond the asteroid belt, i.e., any of Jupiter, Saturn, Uranus, or Neptune.

plural of outer ear

Mongolia; a region south of Siberia, west of Manchuria and north of Inner Mongolia (with closely related native Mongolian population), well north of the Great Wall, which never became an integral part of the Chinese empire, and later achieved autonomy and full independence of China, as the republic of Mongolia

(slang, rare) kisser, someone who makes out (kisses)

(informal) someone who pulls out, or pulls out something.

An item of clothing normally worn outdoors as the outermost layer of clothing.

(mathematical analysis) (of a Borel set) That its measure is equal to the infimum of the measures of all open sets which contain it.