[ blak-waw-ter, -wot-er ]

  1. any of several human or animal diseases characterized by the production of dark urine as a result of the rapid breakdown of red blood cells.

Origin of blackwater

First recorded in 1790–1800; black + water

Other definitions for black water (2 of 2)

black water

  1. wastewater from toilets, garbage disposal, and industrial processes. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use blackwater in a sentence

  • Black Water Rising is dedicated to her paternal grandfather.

  • "I thought prapss you want to fiss," she replied, turning away and looking at the gasogene of black water again.

    Mushroom Town | Oliver Onions
  • The little black water-hen came out of the river and they fed it.

  • A cannon was fired, but its shot and shell went over the heads of the Indians and plowed up the black water beyond.

    Four American Indians | Edson L. Whitney
  • She was noticeably down by the head, and black water was swashing forward of the break of the main-deck.

    Blow The Man Down | Holman Day
  • Anyhow, if it comes to blow too hard for us we can make for shelter into the Crouch or Black Water.

British Dictionary definitions for black water

black water

  1. household waste water that cannot be reused without purification: Compare grey water

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for blackwater


[ blăkwô′tər ]

  1. Wastewater containing bodily or other biological wastes, as from toilets, dishwashers, or kitchen drains. Compare graywater.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.