missal missable • missay · · · Info · Definitions · Characters · · missal · · Text Latin · · Script 6 · · Length Definitions · · · (noun) (Roman Catholic Church) a book containing all the prayers and responses needed to celebrate Mass throughout the year. · · Noun Definition 1 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D s latin small letter s U+0073