Also found in: Thesaurus, Encyclopedia, Wikipedia.
1. The part of a millrace below the water wheel through which the spent water flows.
2. A channel for floating away mine tailings and refuse.
1. (Civil Engineering) a channel that carries water away from a water wheel, turbine, etc. Compare headrace
2. (Mining & Quarrying) mining the channel for removing tailings in water
1. a channel leading away, as from a waterwheel.
2. a channel for conducting tailings away.