from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The place where a sewer, drain, or stream discharges.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A sudden eruption of troops from a fortified place; sally.
  • n. A quarrel; a falling out.
  • n. The point or place of discharge of a river, drain, culvert, sewer, etc.; mouth; embouchure.
  • v. To burst forth, as upon an enemy; make a sally.

from the GNU version of the Collaborative International Dictionary of English

  • n. The mouth of a river; the lower end of a water course; the open end of a drain, culvert, etc., where the discharge occurs.
  • n. A quarrel; a falling out.

from The Century Dictionary and Cyclopedia

  • To burst forth, as upon the enemy; make a sally.
  • n. The point or place of discharge of a river, drain, culvert, sewer, etc.; mouth; embouchure.
  • n. A sudden eruption of troops from a fortified place; a sally.
  • n. A quarrel; a falling out.
  • n. That which is discharged from an outfall. See outfall, 1.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the outlet of a river or drain or other source of water


From Middle English outfallen, equivalent to out- +‎ fall. Compare Dutch uitvallen ("to fall out, sally"), German ausfallen ("to fall out, lunge"), Swedish utfalla ("to fall out"). (Wiktionary)
From out- +‎ fall. Compare Dutch uitval ("outburst, sally, eruption"), German Ausfall ("falling out, sally"), Swedish utfall ("sally, issue"). (Wiktionary)


  • The weakness underscores investors 'continued uncertainty over the long-term outfall of the credit crunch from this summer, said George Vasic, Canadian equity strategist at UBS Securities.

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  • Both entities have confirmed the outfall is a tributary that empties into the Antietam Creek.

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  • Stage said his department has been working everything from the "outfall" drainage ditch which runs from the Interstate 10 feeder road near Vidor Junior High School under the bridge on East (Orange, Texas) Homepage

  • If a hurricane near New Orleans is accompanied by lots of rain these things are known to happen, the city's own, quite famous, pumps will move the rainwater to three "outfall" canals built for that purpose.

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  • Their configuration altered as she walked on, and other features disclosed themselves in the moving landscape: a church tower and a silage tower in the distance, a yellow combine harvester far off at a field's edge, a shed, a sewage outfall.

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  • Where D.C. rain drains: A combined sewer overflow outfall.

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  • There were years when some irrigators couldn't draw water from the system because it wasn't available, and the basin's main waterway—the Murray River—dried up before reaching its outfall in the Southern Ocean, east of Adelaide city.

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  • At other times, as when the Corps opposes the local community's preference for the so-called Option 2 plan for permanent improvements on the outfall canals whose walls failed catastrophically in 2005, the Corps is believed to exaggerate the costs of a project it doesn't want to build.

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  • The volume buying leverage is an outfall of this efficiency.

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  • Last week the waterfall from the sewage outfall into the depleted river had attracted two dozen sand martins flying low over the water to pick up insects attracted by the moisture.

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