American Heritage® Dictionary of the English Language, Fourth Edition
- v. To fill and raise the level of (the bed of a stream) by deposition of sediment.
Century Dictionary and Cyclopedia
- In geology, to grade up; fill up: the opposite of degrade or wear away. A river aggrades its valley when, owing to an increase in the load of detritus or to a decrease of carrying power of its current (as a result of diminution in volume or of tilting of the land), some of its load has to be laid down along its course.
GNU Webster's 1913
- v. (Phys. Geog.) To bring, or tend to bring, to a uniform grade, or slope, by addition of material.
- v. build up to a level by depositing sediment
- ad- + gradation (Wiktionary)
“Even when the river is able to maintain its right of way it may yet have its declivity so lessened that it is compelled to aggrade its course continually, filling the valley with river deposits which may grow to an enormous thickness.”
“In this way they aggrade each portion of it in turn by means of their shifting channels,”
“After building this sheet of waste the streams ceased to aggrade and began the work of destruction.”
“It often occurs that a stream, after having built a flood plain, ceases to aggrade its bed because of a lessened load or for other reasons, such as an uplift of the region, and begins instead to degrade it.”
“It has therefore been slowly subsiding and its streams, although continually carried below grade, have yet been able to aggrade the surface as rapidly as the region sank, and have maintained it, as at present, slightly above sea level.”
“Afther a dale av palatherin’, they aggrade that the divil was to do all that Lord Robert axed him fur twinty years, an’ then to have him sowl an’ body; but if he failed, there was an end av the bargain.”
“So she aggrade to do her best, an’ gev her a little bag to carry wid ’erbs in it, an’ writ some words on two bits av paper an’ the same in Latin.”
“So Nora towld Paddy an’ Paddy said he’d not give her up for all the men in Tipperary or all the shape in Ireland, an’ it was aggrade that in wan way or another, they’d be married in spite av owld O’Moore, though Nora hated to do it, bekase, as I was afther tellin’ ye, she was a good gurrul, an’ wint to mass an’ to her duty reg’lar.”
“So they all aggrade, an’ wint home at wanst to get ready fur the shports.”
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motion toward; addition to; nearness to
Note: can change forms
Words ending with -grade; those describing methods of locomotion in animals are grouped together, starting with "ciliograde".
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