Noun
A tract of low ground between hills, or along the banks of a stream, usually alluvial land, enriched by the overflowings of the river, or by fertilizing deposits of earth from the adjacent hills. Cf. Bottom, n., 7.
Source: Webster's dictionary“By the 1980s, there was an actual junkyard with hundreds of dumped cars,” says Intervale Development Director Chelsea Frisbee. Source: Internet