B - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “B”

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B

noun  us   /bi/

B noun (LETTER)

[C] (plural B’s, Bs, b’s or bs) (also b) the second letter of the English alphabet

B noun (MUSICAL NOTE)

music [C/U] (plural B’s or Bs) in Western music, the seventh note in the scale (= series of notes) that begins on the note C , or a set of notes based on this note

B noun (MARK)

[C] (plural B’s or Bs) a mark that means very good, given to something of satisfactory quality, esp. school work: Mrs. Madden gave me a B on my essay for English.
(Definition of B from the Cambridge Academic Content Dictionary © Cambridge University Press)
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