Someone who admits to something publicly. / Someone who outs another. / One who puts out, ousts, or expels. / An ouster; dispossession. / (UK politics) One who supports leaving the European Union.

An outer part. / (sports) An uncovered section of the seating at a stadium or sportsground. / (military, firearms) The 4th circle on a target, outside the inner and magpie.

Outside; external. / Farther from the centre of the inside.

plural of outer

The quality of being outer.

An externalization or outer projection, such as an external technology that extends the natural reach of something.

plural of outering

Region outside explored space.

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.