Webster's Revised Unabridged Dictionary · 1913

Topgallant

Topgallant , adjective

1.
(Nautical) Situated above the topmast and below the royal mast; designatb, or pertaining to, the third spars in order from the deck; as, the topgallant mast, yards, braces, and the like. See Illustration of Ship.
2.
Figuratively: Highest; elevated; splendid.
The consciences of topgallant sparks. — L'Estrange
Collocations (1)
Topgallant breeze , a breeze in which the topgallant sails may properly be carried.

Topgallant , noun

1.
(Nautical) A topgallant mast or sail.
2.
Figuratively: Anything elevated or splendid. — Bacon