from The Century Dictionary.
- noun The mast nearest to the stern of the ship.
Sorry, no etymologies found.
With much difficulty we succeeded in lowering our after-mast.
Her after-mast came down, the next one came down, the others were swaying.
Still Harry, in the hopes that their small consort was yet afloat, ordered a lantern to be hoisted to their after-mast, that she might be able to follow them during the night.
First the nearest hoisted her big sail, and also set one on her after-mast.