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Meaning of aggrade

ag•grade

Pronunciation: (u-grād'), [key]
— -grad•ed, -grad•ing.
  1. to raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like. Cf. degrade.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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