mean solar time mean solar day • mean sun · · · Info · Definitions · Synonyms · Characters · · mean solar time · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) (astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator). Synonyms: mean time, mean solar time. · · Noun Definition 1 Synonyms · · · mean time · · Synonym 1 Characters · · space U+0020 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 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074