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Meaning of carryback

car•ry•back

Pronunciation: (kar'ē-bak"), [key]
— n.
  1. (in U.S. income-tax law) a special provision allowing part of a net loss or of an unused credit in a given year to be apportioned over one or two preceding years, chiefly in order to ease the tax burden. Cf. carry&syl;forward (def. 2).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.