Meaning of “b” in the English Dictionary

"B" in American English

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Bnoun

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)

"b" in Business English

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bnoun

uk us US UK bn

written abbreviation for billion :

The company lost $3b last year.

(Definition of “b” from the Cambridge Business English Dictionary © Cambridge University Press)