Main definitions of b in English

: b1B2B3


  • 1Physics

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

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

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

    ‘extras (b 6, lb 24, nb 9) 39’




Main definitions of b in English

: b1B2B3


(also b)


  • 1The second letter of the alphabet.

    1. 1.1 Denoting the second in a set of items, categories, sizes, etc.
    2. 1.2 The 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’
    4. 1.4 Denoting the second-highest-earning socio-economic category for marketing purposes, including intermediate management and professional personnel.
    5. 1.5"b"Chess Denoting the second file from the left, as viewed from White's side of the board.
    6. 1.6usually "b" The second fixed constant to appear in an algebraic equation.
    7. 1.7Geology Denoting a soil horizon of intermediate depth, typically the subsoil.
    8. 1.8 The 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.
  • 2usually "B"Music
    The seventh note of the diatonic scale of C major.

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

Main definitions of b in English

: b1B2B3


  • 1Belgium (international vehicle registration).

  • 2Bishop (used in recording moves in chess)

  • 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.


  • plan B

    • An alternative strategy.

      ‘it's time I put plan B into action’
      • ‘I'm afraid it's plan B - I've ordered the donuts - he likes those doesn't he?’
      • ‘Highly agitated by the display before her Felicia fled to the house and began to strategize her plan B for winning back her former husband.’
      • ‘So now you're falling back on plan B - demanding that I turn him over so you can bring him to Dominic.’
      • ‘After months of reassuring everyone that there was no plan B if the French reject the constitution - guess what?’
      • ‘Everyone realises that there is no plan B in the event of failure.’
      • ‘But really, if this writing thing doesn't work out, I realize that if I don't come up with a plan B I actually am going to work in an office for the rest of my life.’
      • ‘If not, they will revert to plan B which is using the same system as last year.’
      • ‘So I keep wondering: What is the Democrats' plan B?’
      • ‘With bigger vessels unfortunately absent, the society turned to plan B, launching five smaller boats into the quay, including a 1943 vintage dinghy used by the Royal Navy.’
      • ‘Calling a few used-car dealerships is probably still not a bad idea - it will take some of the pressure off the sale if I know I have a viable plan B for selling it.’
      • ‘The human race is conducting a gigantic and unpredictable experiment with planet Earth with potentially horrendous consequences and no plan B in sight.’
      • ‘It's called plan B, you know, when you make a pact with a friend to get married if neither one of you finds anyone by the time you're 40.’
      • ‘All week, our game plan had been to throw it wide but I thought plan B worked well.’
      • ‘And our job is to work with them and help them come up with a plan A, a plan B, to define goals and to attain those goals.’
      • ‘While Scotland's great outdoors can be very beautiful and romantic, we do want couples to have a plan B in case the weather turns nasty.’
      • ‘What if I hadn't rushed into a semi-academic job and had pursued my plan B, which was to work as a library assistant and write in every spare moment of the day?’
      • ‘It's a good idea to have a plan B, so if the dotcom millionaire scheme doesn't come off you have something to fall back on.’
      • ‘The iconoclastic inclinations of Ireland's youth are understandable, but there's no plan B.’
      • ‘‘It is not surprising there was no plan B,’ he said, ‘because it is very difficult to work out what it would be.’’
      • ‘I hope she has a plan B if vet school doesn't take her!’