[UP- 2.] An upward rush or flow. (Common in recent use.)

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1873.  B. Stewart, Conserv. Force, iv. 108. The up-rush of air through the chimney.

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1877.  G. F. Chambers, Astron. (ed. 3), I. i. 5. The uprushes of incandescent gas and metallic vapours.

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