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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.

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Mb ² American  

Computers.

1. megabit; megabits.

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MB ³ American  

abbreviation

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

2. Computers. megabyte; megabytes.

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M.B. ⁴ American  

abbreviation

Chiefly British.

1. Bachelor of Medicine.

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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

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Mb ² British  

abbreviation

1. megabit

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mb ³ British  

symbol

1. millibar

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Mb ¹ Scientific  

1. Abbreviation of megabit

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MB ² Scientific  

1. Abbreviation of megabyte

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mb ³ Scientific  

1. Abbreviation of millibar

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Etymology

Origin of M.B.

From New Latin Medicinae Baccalaureus

Example Sentences

“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

The nine-figure agreement will provide the Sultanate of Oman with sovereign control over its digital infrastructure and help MB support the country’s development goals, executives said.

From The Wall Street Journal • Jan. 26, 2026

The scale of devastation may be most comparable to Hurricane Katrina that hit New Orleans, Louisiana, in 2005, Sergio Vale, chief economist at MB Associates, wrote in a note Friday.

From Seattle Times • May 10, 2024

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