Hypertext Webster Gateway: "aggrade"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Aggrade \Ag*grade"\, v. t. [imp. & p. p. {Aggraded}; p. pr. &
vb. n. {Aggrading}.] (Phys. Geog.)
To bring, or tend to bring, to a uniform grade, or slope, by
addition of material; as, streams aggrade their beds by
depositing sediment.
From WordNet (r) 1.7 (wn)
aggrade
v : build up to a level by depositing sediment [ant: {degrade}]
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