quantum theory quantum physics • quaoar · · · Info · Definitions · Characters · · quantum theory · · Text Common · · Latin · · Scripts 14 · · Length 6 · · Syllables Definitions · · · (noun) (physics) a physical theory that certain properties occur only in discrete amounts (quanta). Synonyms: quantum theory. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F q latin small letter q U+0071 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079