Meaning of B in English
/ biː; NAmE / noun , symbol
■ noun (also b ) ( pl. Bs , B's , b's / biːz; NAmE /)
[ C , U ] the second letter of the English alphabet :
'Butter' begins with (a) B / 'B'.
B [ C , U ] ( music ) the 7th note in the scale of C major
B [ C , U ] the second highest mark / grade that a student can get for a piece of work :
She got (a) B in / for History.
B [ U ] used to represent the second of two or more possibilities :
Shall we go for plan A or plan B?
B [ U ] used to represent a person, for example in an imagined situation or to hide their identity :
Let's pretend A meets B in the park.
—see also B-road
used in Britain before a number to refer to a particular secondary road :
the B1224 to York
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005