1.  musical note. second letter of the english alphabet. bed and breakfast - a small inn or hotel that serves breakfast my sister wants to open a small b when she quits her job. bb (bē) is the second letter of the english alphabet. (see: guide to pronunciation, aâ§aâ§ 196, 220.) it is etymologically related to p, v, f, w and m, letters representing sounds having a close organic affinity to its own sound; as in eng. bursar and purser; eng. bear and lat. ferre; eng. silver and ger. silber; lat. cubitum and it. gomito; eng. seven, anglo-saxon seofon, ger. sieben, lat. septem, gr.epta`, sanskrit saptan. the form of letter b is roman, from greek b (beta), of semitic origin. the small b was formed by gradual change from the capital b.note: in music, b is the nominal of the seventh tone in the model major scale (the scale of c major ), or of the second tone in it's relative minor scale (that of a minor ) b♭ stands for b flat, the tone a half step, or semitone, lower than b. in german, b stands for our b♭, while our b natural is called h (pronounced h?).b n