That portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area.
Dissolved chemicals, etc, included in such water. Example: The runoff of nitrates is poisoning the lake.
A second or further round of an indecisive election, after other candidates (often all but the last two) have been eliminated. Example: There will now be a runoff as neither front runner received more than 50% of the vote.
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