See also: B flat English Alternative forms B flat, b flat, b-flat, B♭, te A sharp, a sharp, a-sharp, A-sharp, A♯, li Noun B-flat (plural B-flats) (music) The note one semitone below B, notated B♭. (slang) A bedbug. Coordinate term: F-sharp Derived terms B-flat majorB-flat minor Translations musical note Czech: B (cs), hes (cs) Dutch: bes (nl) f Finnish: B (fi) French: si bémol German: B (de) Hungarian: B (hu), b (hu) Polish: b (pl) Spanish: si bemol m Swedish: bess (sv) n, B (sv) n Wikiwand - on Seamless Wikipedia browsing. On steroids.