a mast on a square-rigger above a topmast or an extension of a topmast
2. Also called: topgallant sail
a sail set on a yard of a topgallant mast
3. (modifier)
of or relating to a topgallant
Word origin
C16: from top1 + gallant
topgallant mast in American English
noun
Nautical
a mast fixed to the head of a topmast on a square-rigged vessel
Word origin
[1505–15]This word is first recorded in the period 1505–15. Other words that entered Englishat around the same time include: alternate, joggle, jump, terrace, wagon