Meg may refer to:

• An informal abbreviation for the SI unit megabyte
• An informal abbreviation for the SI unit megohm
• An informal abbreviation for the extinct megalodon shark
• Meg: A Novel of Deep Terror, a novel featuring a megalodon
• Meg!, a comic strip
• Meg (Mag), a short form of the female name Margaret
• Meg, a short form of the female name Meghan or Megan is a name that was one of the most popular female baby names in the 1990s.
• Malange Airport (airport code: MEG), an airport in Angola
• Meg Griffin, one of the main characters on the hit TV show Family Guy, voiced by Mila Kunis (originally by Lacey Chabert)
• Meg Frampton, guitarist and back-up singer for the band Meg & Dia
• An abbreviation of the names Margaret, Megan, Meghan, Meaghan, etc.

"Meg" is one of nicknames of Japanese common name "Megumi".

MEG may refer to:

• Madras Engineer Group - a regiment of the Corps of Engineers of the Indian Army
• Maghreb-Europe Gas Pipeline
• Magnetoencephalography, a neuroimaging technique to measure the magnetic fields produced by electrical activity in the brain
• Maintenance Entity Group
• Methylecgonidine, a byproduct of smoked crack cocaine
• MEG, the NYSE stock ticker symbol for Media General
• Midland Examining Group, a defunct examination board in the UK
• Monoethylene glycol, a chemical compound widely used as an automotive antifreeze
• Motionless Electrical Generator, a purported perpetual motion machine
• Multiple exciton generation
• Museum Ethnographers Group
• MEG, an album by R&B singer Megan Rochell

Meg may refer to: In fiction:

• In Disney's Hercules, Meg is short for Megara, the hero's love interest.
• Meggie Cleary the female protagonist in The Thornbirds.

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