from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. Simple past tense and past participle of aggrade.

from The Century Dictionary and Cyclopedia

  • In geology, more or less filled with detritus by a stream: said of a valley, basin, or bay.


Sorry, no etymologies found.


  • The lower reaches of most streams have aggraded; here, enough gravel has accumulated to promote subsurface flow, except during and immediately after rainfall.

    Ecoregions of Oklahoma (EPA)

  • Unlike visual recollection, aggraded by a million freeze-frames a day, touch was the sense of darkness.

    The Big Scam

  • Valley trains are deposits of stratified drift with which river valleys have been aggraded.

    The Elements of Geology

  • Valleys aggraded with fine waste form well-nigh level plains over which streams wind from side to side of a direct course in symmetric bends known as meanders, from the name of a winding river of Asia Minor.

    The Elements of Geology

  • In this way each part of the fan is aggraded and its symmetric form is preserved.

    The Elements of Geology

  • We may conceive, then, of the Connecticut valley and the larger trough to the southwest as basins gradually sinking at a rate perhaps no faster than that of the New Jersey coast to-day, and as gradually aggraded by streams from the neighboring uplands.

    The Elements of Geology

  • Since glacial streams are well loaded with waste due to vigorous ice erosion, the valley in front of the glacier is commonly aggraded to a broad, flat floor.

    The Elements of Geology

  • Several debris flows have aggraded the debris fan, including a large one that deposited the prominent levee at right between 1940 and 1965.

    CreationWiki - Recent changes [en]

  • When enough water starts moving, it can scour the aggraded riverbeds, sweeping surplus sediment at frightening speeds.


Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.