Definitions for "Tall Ship"
A tall ship, by definition, is a sailing vessel whose masts are in segments, made up of several timbers in order to give strength, and to make each mast more manageable for partial removal and repairs. The Lady Washington is a tall ship because her masts are each in three sections--lower, and topgallant--joined by caps.
a big sailing ship of traditional design, the kind of ship that opened the whole world to human intercourse and brought the divided branches of mankind together,'' he said
a large square-rigged sailer carrying three or more masts)