Any of several aquatic or waterside plants with large or broad leaves; especially those of the genus Rumex (family Polygonaceae), as western or Scottish dock, R. aquaticus, and (more fully "giant water dock", "great water dock") R. hydrolapathum of streams and lakesides in Europe and western Asia.
Late Middle English; earliest use found in Alphita. From water + dock.
A docking place for a boat.
Late 17th century; earliest use found in John Evelyn (1620–1706), diarist and writer.