apse aproterodont • apse aisle · · · Info · Definitions · Synonyms · Characters · · apse · · Text Latin · · Script 4 · · Length 1 · · Syllables Definitions · · · (noun) a domed or vaulted recess or projection on a building especially the east end of a church; usually contains the altar. Synonyms: apsis. · · Noun Definition 1 Synonyms · · · apsis · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 p latin small letter p U+0070 s latin small letter s U+0073