verb (used with object), ag·grad·ed, ag·grad·ing. Physical Geography.
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. 2019
Examples from the Web for aggrade
Historical Examples of aggrade
Its deposits tend to aggrade (build up) the flat which its meanderings develop.
In this way they aggrade each portion of it in turn by means of their shifting channels.The Elements of Geology
William Harmon Norton
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