変へん記き号ごうへんきごうMeanings1nounflat signmusicIn music notation, the symbol ♭ that lowers a note by a semitone. Compare with 嬰記号 (sharp sign).See also: 嬰記号この楽がく譜ふでは、シの音おとに変へん記き号ごうが付ついています。In this score, the B note has a flat sign.