gaff topsail

Definitions of gaff topsail
  1. noun
    a triangular fore-and-aft sail with its foot along the gaff and its luff on the topmast
    synonyms: fore-and-aft topsail
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    type of:
    fore-and-aft sail
    any sail not set on a yard and whose normal position is in a fore-and-aft direction
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