[UNDER-1 4 a, b. Cf. OE. underflówan.]

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  1.  intr. To flow beneath.

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1610.  Holland, Camden’s Brit., II. 45. It looketh downe to the underflowing sea.

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1647.  Hexham, I.

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  2.  trans. To flow in under (something).

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1872.  Dixon, Switzers, v. 45. The waters … underflowed the beams, and lifted the strong habitations.

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