mountain sickness mountain-sick • mountainside · · · Info · Definitions · Characters · · mountain sickness · · Text Common · · Latin · · Scripts 17 · · Length 4 · · Syllables Definitions · · · (noun) nausea and shortness of breath experienced by mountain climbers above ten thousand feet. Synonyms: mountain sickness. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075