plain song plain sewing • plain speaking · · · Info · Definitions · Synonyms · Characters · · plain song · · Text Common · · Latin · · Scripts 10 · · Length 2 · · Syllables Definitions · · · (noun) a liturgical chant of the Roman Catholic Church. Synonyms: plainsong, plainchant, Gregorian chant. · · Noun Definition 1 Synonyms · · · plainsong · · Synonym 1 plainchant · · Synonym 2 gregorian chant · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C 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