- a mast fixed to the head of a topmast on a square-rigged vessel.
Origin of topgallant mast
First recorded in 1505–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for topgallant mast
Mulford soon had the reef out, and the sail distended to the utmost, while the topgallant-mast was soon up and fidded.
Ay, ay; I've sprung my topgallant-mast, and think this a good occasion to get another up in its place.
The topgallant-mast still reared its taper form high above me, and the worst was yet to come.Hudson Bay
A yet smaller mast, elevated through irons at the head of the topgallant-mast; but more generally the two are formed of one spar.
The mast-rope employed to sway up a top-mast or topgallant-mast, in order to fix it in its place, or lower it.