runoff

[ruhn-awf, -of]

noun

1. something that drains or flows off, as rain that flows off from the land in streams.

2. a final contest held to determine a victor after earlier contests have eliminated the weaker contestants.

3. a deciding final contest held after one in which there has been no decisive victor, as between two contestants who have tied for first place.

4. Also called rundown. a continual or prolonged reduction, especially in quantity or supply.

   a runoff in bank deposits; a sharp runoff in business inventories.

5. Stock Exchange.,  the final prices appearing on the ticker after the closing bell is rung for the trading day.

Word History and Origins

Origin of runoff¹

1850–55, noun use of verb phrase run off; runoff ( def. 2, 3 ) -off

Example Sentences

The duration of cyanobacterial blooms is increasing with climate warming and nutrient inputs associated with agricultural runoff and sewage discharges.

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“We see downside risk to consensus revenue estimates from ongoing mortgage runoff, sub-system business loan growth, and lending competition,” MS says.

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One Beverly Hills will feature botanical gardens that reflect the diverse landscape of Southern California, with drought-resistant native plants fed solely on recycled water, including rainfall and the runoff from residents’ sinks and showers.

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The National Weather Service warned that “excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.”

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But the especially high number of animal deaths this year prompted several research teams to investigate whether runoff from the fires may have accelerated algae growth to particularly dangerous proportions.

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Related Words

• drainage 

When To Use

What is a runoff?

Runoff is liquid, especially water or rainwater, that flows off or drains away, as in The storm sewer could not hold all the runoff from the recent rains. This sense of runoff is often used in the context of environmental science. It often refers to water that flows into streams or back into the water supply rather than seeping into the ground. For example, when farm crops are watered, any water that is not absorbed into the ground and drains away instead is runoff.This term comes from the verb phrase run off, which can mean to drain or flow away, as in The wastewater runs off into the stream. An unrelated but also common meaning of runoff refers to a competition that determines a final winner after earlier contests have narrowed down the competitors. Similarly, it can refer to a contest held to determine a winner when the initial contest did not produce one, such as when two people tie. This sense of the word is especially used in the context of political elections.For example, a place may hold an election that features five candidates. After the election, the lowest vote-getter is removed and another election is held with the remaining candidates. This process is repeated until only two candidates are left. This final election, which finally decides the winner, is called a runoff.Less commonly, the verb run off can mean to decide a winner through a runoff, as in The final contest will be run off at the end of the month. Example: Due to the use of pesticides in many industrial farms, runoff becomes a major concern for local water supplies.