Main definitions of b in English

: B1B2

B1

(also b)

noun

  • 1The second letter of the alphabet.

    1. 1.1Denoting the second in a set of items, categories, sizes, etc.
    2. 1.2The second highest class of academic mark.
      ‘my grade on that first paper was a B’
    3. 1.3(in the UK) denoting a secondary road.
      ‘the B4248’
      ‘B-roads’
    4. 1.4Denoting the second-highest-earning socio-economic category for marketing purposes, including intermediate management and professional personnel.
    5. 1.5Chess
      Denoting the second file from the left, as viewed from White's side of the board.
    6. 1.6The second fixed constant to appear in an algebraic equation.
    7. 1.7Geology
      Denoting a soil horizon of intermediate depth, typically the subsoil.
    8. 1.8The human blood type (in the ABO system) containing the B antigen and lacking the A.
    9. 1.9(with numeral) denoting a series of international standard paper sizes each twice the area of the next, as B0, B1, B2, B3, B4, etc., B4 being 250 × 353 mm.
  • 2Music
    The seventh note of the diatonic scale of C major.

    1. 2.1A key based on a scale with B as its keynote.

Pronunciation:

B

/biː/

Main definitions of b in English

: B1B2

B2

  • 1Belgium (international vehicle registration).

  • 2Bishop (used in recording moves in chess)

    ‘Be5’
  • 3Black (used in describing grades of pencil lead)

    ‘2B pencils’
  • 4Bomber (in designations of US aircraft types)

    ‘a B-52’

  • 1The chemical element boron.

  • 2Physics
    Magnetic flux density.

Pronunciation:

B

/biː/

Main definitions of b in English

: B1B2

b

  • 1Physics
    Barn(s).

  • 2Born (used to indicate a date of birth)

    ‘George Lloyd (b.1913)’
  • 3Cricket
    (on scorecards) bowled by.

    ‘AC Hudson b Prasad 146’
  • 4Cricket
    (on scorecards) bye(s)

    ‘extras (b 6, lb 24, nb 9) 39’

Pronunciation:

b

/biː/