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Meaning of waterflood

wa•ter•flood

Pronunciation: (wô'tur-flud", wot'ur-), [key]
— n.
  1. (in the petroleum industry) a method of secondary recovery whereby water is pumped into reservoir rock to force out oil that has ceased to flow under its own pressure.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.