A raised rim or border around an opening, as on a ship's deck, designed to keep out water.
A raised border around a hatchway, roof opening, etc., to keep out water.
A raised frame, designed to deflect or prevent entry of water, around an opening (e.g., a hatch or skylight) in a flat surface, such as a roof or deck.
Origin of coaming
- Origin unknown
From American Heritage Dictionary of the English Language, 5th Edition