PEBBLE English Definition and Meaning | Lexico
noun. A small stone made smooth and round by the action of water or sand. as modifier 'a narrow pebble beach'. More example sentences. 'We had sediments, river mud, pebbles rounded by water action, even the remains of aquatic plants on the site.'. 'It's a lovely place and we walked across stepping stones and skimmed pebbles in the ...