What is rubble?

Question

what is rubble

Answer 1

broken bricks and builders rubbish.

Answer 2

Rubble???

Barney Rubble is Fred Flinstones neighbor.

Hope this helps.

Answer 3

If I have a brick garden wall for instance, and I take a sledge hammer and knock it all to bits, the heap of broken brick and old mortar in that heap is referred to as "RUBBLE"