long topgallant mast: Meaning and Definition of

long" topgal'lant mast"

Pronunciation: [key]
— Naut. Naut.
  1. a single spar fitted above a topmast to carry topgallants, a royal, and all sails above.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.