b


abbreviation
  1. Physics.

    • bar; bars.

    • barn; barns.

Other definitions for B (2 of 7)

B1

or b

[ bee ]

noun,plural B's or Bs, b's or bs.
  1. the second letter of the English alphabet, a consonant.

  2. any spoken sound represented by the letter B or b, as in bid, bauble, or daubed.

  1. something having the shape of a B.

  2. a written or printed representation of the letter B or b.

  3. a device, as a printer's type, for reproducing the letter B or b.

Other definitions for B (3 of 7)

B2

abbreviation
  1. Black1. : Also b

  1. Photography. bulb (def. 8).

Other definitions for B (4 of 7)

B3

Symbol.
  1. the second in order or in a series.

  2. (sometimes lowercase) (in some grading systems) a grade or mark, as in school or college, indicating the quality of a student's work as good or better than average.

  1. (sometimes lowercase) (in some school systems) a symbol designating the second semester of a school year.

  2. Physiology. a major blood group usually enabling a person whose blood is of this type to donate blood to persons of type B or AB and to receive blood from persons of type O or B.: Compare ABO system.

  3. Music.

    • the seventh tone in the scale of C major or the second tone in the relative minor scale, A minor.

    • a string, key, or pipe tuned to this tone.

    • a written or printed note representing this tone.

    • (in the fixed system of solmization) the seventh tone of the scale of C major, called ti.

    • the tonality having B as the tonic note.

  4. (sometimes lowercase) the medieval Roman numeral for 300.

  5. Chemistry. boron.

  6. a proportional shoe width size, narrower than C and wider than A.

  7. a proportional brassiere cup size, smaller than C and larger than A.

  8. Electricity. susceptance.

  9. a designation for a motion picture made on a low budget and meant as the secondary part of a double feature.

  10. a quality rating for a corporate or municipal bond, lower than BB and higher than CCC.

Other definitions for B- (5 of 7)

B-

U.S. Military.
  1. (in designations of aircraft) bomber: B-29.

Other definitions for b. (6 of 7)

b.

abbreviation
  1. bachelor.

  2. bale.

  1. Baseball. base; baseman.

  2. bass.

  3. basso.

  4. bay.

  5. billion.

  6. blend of; blended.

  7. book.

  8. born.

  9. breadth.

  10. brother.

  11. brotherhood.

Other definitions for B. (7 of 7)

B.

abbreviation
  1. bachelor.

  2. bacillus.

  1. Baseball. base; baseman.

  2. bass.

  3. basso.

  4. bay.

  5. Bible.

  6. bolivar.

  7. boliviano.

  8. book.

  9. born.

  10. breadth.

  11. British.

  12. brother.

  13. brotherhood.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use b in a sentence

British Dictionary definitions for b (1 of 6)

b

symbol for

British Dictionary definitions for b (2 of 6)

b

B

/ (biː) /


nounplural b's, B's or Bs
  1. the second letter and first consonant of the modern English alphabet

  2. a speech sound represented by this letter, usually a voiced bilabial stop, as in bell

  1. Also: beta the second in a series, esp the second highest grade in an examination

British Dictionary definitions for B (3 of 6)

B

symbol for
  1. music

    • a note having a frequency of 493.88 hertz (B above middle C) or this value multiplied or divided by any power of 2; the seventh note of the scale of C major

    • a key, string, or pipe producing this note

    • the major or minor key having this note as its tonic

  2. the supporting or less important of two things: the B side of a record

  1. a human blood type of the ABO group, containing the B antigen

  2. (in Britain) a secondary road

  3. the number 11 in hexadecimal notation

  4. chem boron

  5. magnetic flux density

  6. chess bishop

  7. (on Brit pencils, signifying degree of softness of lead) black: B; 2B; 3B Compare H (def. 5)

  8. Also: b physics bel

  9. physics baryon number

  10. balboa

  11. belga

  12. bolivar

  13. photog B-setting

    • a person whose job is in middle management, or who holds an intermediate administrative or professional position

    • (as modifier): a B worker See also occupation groupings

abbreviation for
  1. Belgium (international car registration)

British Dictionary definitions for B- (4 of 6)

B-

abbreviation for(of US military aircraft)
  1. bomber: B-52

British Dictionary definitions for b. (5 of 6)

b.

abbreviation for
  1. born

  2. cricket bowled

British Dictionary definitions for B. (6 of 6)

B.

abbreviation for
  1. (on maps, etc) bay

  2. British

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for B

B

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.