the part of the mainmast situated immediately above, and generally formed as a single spar with, the main topgallantmast.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use main royal mast in a sentence
The smoke of her gun was sailing off to leeward in a little cloud, and signals were again flying at her main-royal-mast-head.The Wing-and-Wing | J. Fenimore Cooper
We were not long in manufacturing a Dutch pennant, which was run up to the main-royal mast-head.The Mate of the Lily | W. H. G. Kingston
But I was a little surprised when he followed this up by hoisting a small red swallow-tailed flag to his main-royal-mast-head.The Congo Rovers | Harry Collingwood