from The Century Dictionary.
- noun A large roofed building in which masts are made or prepared for use.
Sorry, no etymologies found.
Before leaving we went into the mast-house, near the entrance to the yard.
Notwithstanding this, Sir Sidney and his brave companions destroyed ten of the enemy's ships of the line in the arsenal, with the mast-house, the great storehouse and other buildings.
Here, East India ships are built, launched, and repaired: there are two on the stocks now of considerable magnitude; the premises are extensive and commodious, and that high building which you see is a mast-house, and the other buildings about the yard are devoted to sail lofts, and shops for the various artizans, requisite to complete the ~~391~~~ grand design of building and fitting out a ship for sea.
Real Life In London, Volumes I. and II. Or, The Rambles And Adventures Of Bob Tallyho, Esq., And His Cousin, The Hon. Tom Dashall, Through The Metropolis; Exhibiting A Living Picture Of Fashionable Characters, Manners, And Amusements In High And Low Life (1821)