Meaning of topsail

top•sail

Pronunciation: (top'sāl"Naut.top's&schwal), [key]
— n. Naut.
  1. a sail, or either of a pair of sails, set immediately above the lowermost sail of a mast and supported by a topmast. See diag. under ship.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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