Definition of "sickbay"

sickbay

noun
plural sickbays
1. A place used as a hospital on board a ship, on a spaceship (in science fiction).
2. A room or area for the treatment of the sick or injured in a school.
  Quotations
  It was the piano lesson again—an orange-tiled floor, one high window, a new upright in a bare room close to the sickbay,
  2022, Ian McEwan, Lessons, page 3