capstone capstan • capsula · · · Info · Definitions · Synonyms · Characters · · capstone · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a final touch; a crowning achievement; a culmination. Synonyms: finishing touch, copestone. · · Noun Definition 1 (noun) a stone that forms the top of wall or building. Synonyms: copestone, coping stone, stretcher. · · Noun Definition 2 Synonyms · · · finishing touch · · Synonym 1 copestone · · Synonym 2 coping stone · · Synonym 3 stretcher · · Synonym 4 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074