- The definition of a quay is a wharf or platform built into the water and used to load or unload ships or other sea vessels.
A concrete or stone dock for loading boats is an example of a quay.
Boats tied up at a quay in Italy.
quay definition by Webster's New World
Origin: Middle English kei ; from Middle French cai ; from Celtic (as in Welsh cae and amp; Breton kai, enclosure) ; from Indo-European base an unverified form kagh-, to enclose from source hedge: eastern; English spelling, spelled influenced, influence by French quai (OFr cai), of same origin, originally
quay definition by American Heritage Dictionary
Origin: Middle English keye, from Old North French cai, of Celtic origin.