Topic: LETTERS AND PUNCTUATION
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B , b
plural B's, b's
plural B's, b's1SLA [uncountable and countable] the second letter of the English alphabet
2 [uncountable and countable] the seventh note in the musical scale of C major or the musical key based on this note
3 [countable] a mark given to a student's work to show that it is good but not excellent : I got a B in history.
I got a B in history.4 [uncountable] used to refer in a short way to one of two different things or people. You can call the first one A. : the advantages and disadvantages of choosing product A or B
the advantages and disadvantages of choosing product A or B➔ plan B
at plan1 (6)6 [uncountable] a common type of blood
