Definition of in floodof a river, lake, etc.
- After a week of rain, the river is in (full) flood.
: a rising and overflowing of a body of water especially onto normally dry land
: a flood described in the Bible as covering the earth in the time of Noah
: the flowing in of the tide
: to cover with a flood : inundate
: to fill abundantly or excessively
: to supply an excess of fuel to (an engine, a carburetor, etc.) so that engine operation is hampered
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