aggrade

[uh-greyd]

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.

Compare degrade.

Origin of aggrade

First recorded in 1895–1900; ag- + grade

Related formsag·gra·da·tion

[ag-ruh-dey-shuh n] /ˌæg rəˈdeɪ ʃən/, nounag·gra·da·tion·al, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for aggradation

Historical Examples of aggradation

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

British Dictionary definitions for aggradation

aggrade

verb

(tr) to build up the level of (any land surface) by the deposition of sedimentCompare degrade (def. 4)

Derived Formsaggradation (ˌæɡrəˈdeɪʃən), noun

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