1an overflowing of a large amount of water beyond its normal confines, especially over what is normally dry land:in a thousand miles the flood destroyed every bridgepeople uprooted by drought or flood [as modifier]:a flood barrier
(the Flood) the biblical flood brought by God upon the earth because of the wickedness of the human race (Gen. 6 ff.).
the inflow of the tide.
literary a river, stream, or sea.
2an outpouring of tears or emotion:Rose burst into such a flood of tears and sobs as I had never seen
a very large quantity of people or things that appear or need to be dealt with:a constant flood of callers