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  • mb
    mb
    millibar; millibars.
  • Mb
    Mb
    megabit; megabits.
  • MB
    MB
    abbreviation
    Manitoba, Canada (approved for postal use).
  • M.B.
    M.B.
    abbreviation
    Bachelor of Medicine.

mb

1 American  
Physics.
  1. millibar; millibars.

  2. millibarn; millibarns.


Mb 2 American  
Computers.
  1. megabit; megabits.


MB 3 American  

abbreviation

  1. Manitoba, Canada (approved for postal use).

  2. Computers. megabyte; megabytes.


M.B. 4 American  

abbreviation

Chiefly British.
  1. Bachelor of Medicine.


MB 1 British  

abbreviation

  1. Bachelor of Medicine

  2. maternity benefit

  3. (esp in postal addresses) Manitoba

  4. (in Canada) Medal of Bravery

  5. computing megabyte

"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

Mb 2 British  

abbreviation

  1. megabit

"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

mb 3 British  

symbol

  1. millibar

"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

Mb 1 Scientific  
  1. Abbreviation of megabit


MB 2 Scientific  
  1. Abbreviation of megabyte


mb 3 Scientific  
  1. Abbreviation of millibar


Etymology

Origin of M.B.

From New Latin Medicinae Baccalaureus


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The storm's central air pressure dropped to 892 millibars as of the National Hurricane Center's advisory on Tuesday morning local time, below Hurricane Katrina's 902 mb.

From BBC ● Oct. 28, 2025

The sea level pressure at Seattle Tacoma Airport was 978.3 mb on Dec. 27, the seventh lowest on record.

From Seattle Times ● Jan. 20, 2023

Maximum sustained winds were 105 mph with a minimum central pressure of 965 mb.

From BBC ● Sep. 16, 2020

Pictures should ideally be 300 dpi and 1 mb.

From The Guardian ● Jun. 13, 2012

While I am still able, I go about the business of healing, crushing leaves of me to mb on aching joints and applying poultices to clear the lungs.

From "Ophelia" by Lisa Klein

To monitor gene expression level along the T. urartu chromosomes in the three organs, we applied a window shift size of 5 Mb in a customized perl script.

From Nature ● May 8, 2018

The unanchored super-scaffolds were short and accounted for about 200 Mb.

From Nature ● Nov. 14, 2017

This Saccoglossus assembly includes 7,282 total scaffold sequences spanning a total length of 758 Mb.

From Nature ● Nov. 17, 2015

Recent TE activity accounts for only 2 Mb of the size difference.

From Nature ● Jun. 10, 2014

For instance, on a 2:1 site, to download a 4 Mb file, one must first upload at least 2 Mb of files.

From The Jargon File, Version 4.2.2, 20 Aug 2000 by Guy L. Steele

I don’t know the woman’s full name; her name tag simply said MB.

From Salon ● Oct. 11, 2026

“Enjoy the current pump figures,” said MB Ghalibaf, speaker of the Islamic Republic of Iran’s parliament, in a post on X on Sunday.

From MarketWatch ● Apr. 12, 2026

Shortly after Lehman folded, AIG found itself obligated to pay, all at once, the parties to whom it had sold CDS on MB.

From Barron's ● Feb. 24, 2026

MB Group, a conglomerate in Oman, on Monday said it struck a deal with San Francisco-based Astranis for an internet satellite.

From The Wall Street Journal ● Jan. 26, 2026

Because these names were long, and because they used uncommon letters and combinations like F and MB, they stood out.

From "The Woman All Spies Fear" by Amy Butler Greenfield

"The pioneering approach shows potential in targeting inflammatory disease sites more precisely and improving immunosuppression and healing outcomes," says Saad Kenderian, M.B.,

From Science Daily ● Apr. 1, 2024

“When decisions are made about whether to abolish daylight saving time, there is no need to take concerns regarding heart health into account,” says Bernard J. Gersh, M.B.,

From Seattle Times ● Mar. 6, 2024

A 2017 video of an officer handcuffing M.B.

From Washington Post ● Dec. 24, 2020

“Considering the severity of the accident, the loss of life was limited,” M.B.

From New York Times ● Aug. 7, 2020

Kitty opened one now—a bitter complaint, which should have gone to M.B.

From What Not A Prophetic Comedy by Dame Rose Macaulay

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