- to raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like.
Origin of aggrade
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for aggradation
Long continued glacial drainage usually results in a large measure of aggradation.
- (tr) to build up the level of (any land surface) by the deposition of sedimentCompare degrade (def. 4)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012