Definitions for "Topmast"
Keywords:  mast, topgallant, spar, fore, sail
The second mast, or that which is next above the lower mast, and below the topgallant mast.
The second mast, or that which is next above the lower mast. Above that is the top-gallant-mast.
The spar next above a lower mast and below the topgallant mast.
Keywords:  def, see
See , def. 2.