Dun (dŭn), v. t. & i. [imp. & p. p.Dunned (dŭnd); p. pr. & vb. n.Dunning (dŭn″nĭng).] [AS. dyne noise, dynian to make a noise, or fr. Icel. dynr, duna, noise, thunder, duna to thunder; the same word as E. din. √74. See Din.] To ask or beset, as a debtor, for payment; to urge importunately.
Hath she sent so soon to dun? Swift.