See Also: topmast(dictionary)
fore-topmast(dictionary)

topmast (iou)



topmast noun. L15.
[from TOP adjective + MAST noun1.]
Nautical. A mast attached to the top of a lower mast; spec. the second section of a mast above the deck, formerly the uppermost mast, later surmounted by the topgallant mast.