upper surface upper side • upper ten · · · Info · Definitions · Characters · · upper surface · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) the side that is uppermost. Synonyms: upper surface. · · 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 f latin small letter f U+0066 p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075