[countable, uncountable] a large amount of water covering an area that is usually dry. The heavy rain has caused floods in many parts of the country.

a large amount of water covering an area that is usually dry. The heavy rain caused floods in many parts of the country.

fill with water. ​ [intransitive, transitive] if a place floods or something floods it, it becomes filled or covered with water.

1[intransitive, transitive] if a place floods or something floods it, it becomes filled or covered with water The basement floods whenever it rains heavily.

​large amounts of water covering an area that is usually dry; the fact of this happening. There will be heavy rain with flooding in some areas.

There are 11 meanings listed in OED's entry for the noun flood, one of which is labelled obsolete. See 'Meaning & use' for definitions, usage, and quotation ...

​(of an area that is usually dry) covered by a large amount of water. flooded fields. Questions about grammar and vocabulary?

a sudden flood of water caused by heavy rain. Wordfinder downpour drought flash flood monsoon precipitation puddle rain shelter shower squall

Definition of flash flood noun from the Oxford Advanced American Dictionary flash flood noun a sudden flood of water caused by heavy rain.

to cause to fill or become covered with water, especially in a way that causes problems: Our washing machine broke down yesterday and flooded the kitchen.