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.
[Webster 1913 Suppl.]