(a.) Being on the outside; external; farthest or farther from the interior, from a given station, or from any space or position regarded as a center or starting place; - opposed to inner; as, the outer wall; the outer court or gate; the outer stump in cricket; the outer world.

(2):

(n.) The part of a target which is beyond the circles surrounding the bull's-eye.

(3):

(n.) A shot which strikes the outer of a target.

(4):

(v.) One who puts out, ousts, or expels; also, an ouster; dispossession.

Bibliography Information
Webster, Noah. Entry for 'Outer'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/o/outer.html. 1828.

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Webster's Dictionary

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Outer