'Wasteweir' definitions:

Definition of 'wasteweir'

From: WordNet
noun
A channel that carries excess water over or around a dam or other obstruction [syn: spillway, spill, wasteweir]

Definition of 'Wasteweir'

From: GCIDE
  • Wasteweir \Waste"weir`\, n. An overfall, or weir, for the escape, or overflow, of superfluous water from a canal, reservoir, pond, or the like. [1913 Webster]