Real Dictionary

flood
variable noun: If there is a flood, a large amount of water covers an area which is usually dry, for example when a river flows over its banks or a pipe bursts.
verb: If something such as a river or a burst pipe floods an area that is usually dry or if the area floods, it becomes covered with water.

flood in American English
an overflowing of water on an area normally dry; inundation; deluge
intransitive verb: to flow or pour in or as if in a flood
noun: a great flowing or overflowing of water, esp. over land not usually submerged
transitive verb: to overflow in or cover with a flood; fill to overflowing

flood in British English
noun: the inundation of land that is normally dry through the overflowing of a body of water, esp a river

Flood in British English 1
noun

Flood in British English 2
noun: Henry. 1732–91, Anglo-Irish politician: leader of the parliamentary opposition to English rule

flood in Insurance
noun: If there is a flood, a large amount of water covers an area which is usually dry.