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

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

Pictures should ideally be 300 dpi and 1 mb.

From The Guardian • Jun. 13, 2012

Happy New Year, National Geographic: Thanks to you, you helped me manage to get One Perfect Gift for my husband with your Complete National Geographic on a 160 mb hard drive.

From Newsweek • Dec. 30, 2009

Stretched far across the glass, we begin to mb and polish.

From "Taste of Salt: A Story of Modern Haiti" by Frances Temple