A person outside the society referred to. This is possibly American.

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1833.  For those he cannot entertain, the outsiders, “without a home to cover them,” he sends five yards (newspaper measure) of oratory for comfort and clothing.—A. Fonblanque, ‘England under Seven Administrations’ (1837), ii. 354. (N.E.D.)

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1844.  The word was used in the Baltimore Convention.—Marsh, ‘English Language,’ p. 274. (N.E.D.)

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1855.  Were I to quote from Joseph Smith, or from Brigham Young, a sentiment for my ground work, you might be gratified and complimented; but the world, or outsiders might think it folly, blasphemy, nonsense, and trusting in man.—Orson Hyde, at the Mormon Tabernacle, March 18: ‘Journal of Discourses,’ ii. 202. [So the speaker quoted from Franklin Pierce.]

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