seawater adjective 2noun 1forms 1 adjective2 •Consisting of seawater.The continual seawater splashes corroded our equipment •Associated in some way with seawater, or intended for dealing with seawater.The sharks in the aquarium had to be kept in a seawater tankAboard the ship we needed seawater soap for washing our clothes noun1 •The saltwater of a sea or ocean. formsseawaters
