Noun: topgallant ,tóp'ga-lunt
- A mast fixed to the head of a topmast on a square-rigged vessel
"The sailor climbed up to the topgallant mast to adjust the rigging";
- topgallant mast [archaic]
- A sail set on a yard of a topgallant mast
"They unfurled the topgallant sail to catch more wind";
- topgallant sail [archaic]
Derived forms: topgallants
Type of: canvas, sail, sheet, topmast
Encyclopedia: Topgallant