Select the most appropriate meaning of the given idiom.

It’s raining cats and dogs

To rain very heavily

The most appropriate meaning of the given idiom "It’s raining cats and dogs" is to rain very heavily.

This idiom is used to describe a heavy downpour of rain. It is thought to have originated from the fact that cats and dogs are often seen running around in the rain, which gives the impression that it is raining so heavily that even animals are being swept away.

The other options are not as accurate descriptions of the meaning of the idiom.

• To rain continuously: This idiom is more accurately described as "to rain non-stop."
• To rain mildly: This idiom is more accurately described as "to rain lightly."
• To rain at regular intervals: This idiom is more accurately described as "to rain in a steady pattern."