water vapour water vapor • water-vascular · · · Info · Definitions · Synonyms · Characters · · water vapour · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) water in a vaporous form diffused in the atmosphere but below boiling temperature. Synonyms: water vapor, water vapour. · · Noun Definition 1 Synonyms · · · water vapor · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076 w latin small letter w U+0077