Rare/archaic verb meaning 'to jut or project outward'.
Definitions
(of a structure or part of a building) to jut or project outward. The balcony jettied over the narrow street.
Archaic/literary use meaning 'jet-black'; used attributively (e.g., 'jetty hair').
Definitions
Deep, glossy black like the mineral jet; jet-black. Her jetty curls contrasted sharply with her pale skin.