waterline waterlike • waterlog · · · Info · Definitions · Synonyms · Characters · · waterline · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a line corresponding to the surface of the water when the vessel is afloat on an even keel; often painted on the hull of a ship. Synonyms: water line, water level. · · Noun Definition 1 Synonyms · · · water line · · Synonym 1 water level · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 w latin small letter w U+0077