gaff : Idioms & Phrases
gaff topsail
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noun a triangular fore-and-aft sail with its foot along the gaff and its luff on the topmast
fore-and-aft topsail.
WordNet
gaff-headed sail
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noun a quadrilateral fore-and-aft sail suspended from a gaff
gaffsail.
WordNet
gaff-topsail
Gaff`-top"sail noun
Definitions
(Naut.) A small triangular sail having its foot extended upon the gaff and its luff upon the topmast.
Webster 1913
Monkey gaff
(Naut.) , a light gaff attached to the topmast for the better display of signals at sea.