What does the word coaming mean?

Usage examples for coaming

  1. They were lifting somebody through the hatchway, and the body they lifted clung for a moment to the hatchway coaming, to steady itself. – News from the Duchy by Sir Arthur Thomas Quiller-Couch
  2. He traced these seams and found that they ended in a coaming at each side of the shaft alley. – The Ice Pilot by Henry Leverage