Definition: "Pebble" refers to a small, round object that can be easily carried on the ground. Its most common meaning is in relation to stones or small pieces of stone, such as pebbles or sand. It's also used in the context of a rough surface like gravel or concrete. A pebble could be a bit gritty and uneven, but it can also mean anything you'd need to clean with a sponge or brush (like dust).