to raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like.
- ag·gra·da·tion [ag-ruh-dey-shuhn], /ˌæg rəˈdeɪ ʃən/, noun
- ag·gra·da·tion·al, adjective
- Compare degrade.
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How to use aggrade in a sentence
Long continued glacial drainage usually results in a large measure of aggradation.The Geography of the Region about Devils Lake and the Dalles of the Wisconsin | Rollin D. Salisbury
The desert country toward the mouth is largely a sandy or gravelly aggradation plain of the river.
British Dictionary definitions for aggrade
(tr) to build up the level of (any land surface) by the deposition of sediment: Compare degrade (def. 4)
- aggradation (ˌæɡrəˈdeɪʃən), noun
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