turnstonePronunciation: /ˈtəːnstəʊn/Definition of turnstone noun a small short-billed wading bird of the sandpiper family that turns over stones to feed on small animals beneath them. Genus Arenaria, family Scolopacidae: two species, in particular the (ruddy) turnstone (A. interpres), breeding in northern Eurasia and northern Canada turnstone in other Oxford dictionaries Definition of turnstone in the US English dictionary