D defs.my
Entry 1 sense Webster, 1913

Flume

/(f;ūm)/ · IPA /fluːm/
01 n. A stream; especially, a passage channel, or conduit for the water that drives a mill wheel; or an artifical channel of water for hydraulic …
  1. 1.
    A stream; especially, a passage channel, or conduit for the water that drives a mill wheel; or an artifical channel of water for hydraulic or placer mining; also, a chute for conveying logs or lumber down a declivity.