mega-

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variant of megalo- (megalith); also the initial element in units of measure that are equal to one million of the units denoted by the base word (megahertz). Symbol: M

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Also especially before a vowel, meg-.

Origin of mega-

Combining form representing Greek mégas large, great

Words nearby mega-

meet with, mefenamic acid, meff, mefloquine, meg, mega-, megabit, megabuck, megabyte, megacephalic, megacephaly

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use mega- in a sentence

We have reached a tipping point where mega donors completely dominate the landscape.
The 100 Rich People Who Run America|Mark McKinnon|January 5, 2015|DAILY BEAST
And who can blame them for feeling disenfranchised when they see their efforts dwarfed by the mega donors.
The 100 Rich People Who Run America|Mark McKinnon|January 5, 2015|DAILY BEAST
Art Basel itself is but the center of a cluster of mega-shows taking place in Miami this week.
Sneer and Clothing in Miami: Inside The $3 Billion Woodstock of Contemporary Art|Jay Michaelson|December 6, 2014|DAILY BEAST
The FSLN-controlled legislative assembly approved the mega-project under a cloud of secrecy in a record seven days.
China’s Nicaragua Canal Could Spark a New Central America Revolution|Nina Lakhani|November 30, 2014|DAILY BEAST

Mary Matalin once dubbed him a “mega-multimedia Wunderkind!”
Ben Carson’s Bizarrely Serious, Seriously Bizarre Campaign Crew|Olivia Nuzzi|November 12, 2014|DAILY BEAST
Correspondingly, the merozoites, to which they give rise, are also different (micro-and mega-merozoites).
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various
As this letter A is formed by a larger aperture than the former one, it may be called A mega.
The Temple of Nature; or, the Origin of Society|Erasmus Darwin.
I call him Mega-ergaton docile, 'the teachable great-worker.'
A Century of Science and Other Essays|John Fiske
They foresaw a multi-ethnic, multi-cultural socialist mega-state.
After the Rain|Sam Vaknin
The prime example is Japan, which constructed its whole mega-economy on these bases.
After the Rain|Sam Vaknin

British Dictionary definitions for mega- (1 of 2)

mega

/ (ˈmɛɡə) /

adjective

slang extremely good, great, or successful

Word Origin for mega

C20: probably independent use of mega-

British Dictionary definitions for mega- (2 of 2)

mega-

combining form

denoting 10 6megawatt Symbol: M

(in computer technology) denoting 2 20 (1 048 576)megabyte

large or greatmegalith

informal great in importance or amountmegastar

Word Origin for mega-

from Greek megas huge, powerful

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 mega-

mega-

A prefix that means:

Large, as in megadose, a large dose.

One million, as in megahertz, one million hertz.

220 (that is, 1,048,576), which is the power of 2 closest to a million, as in megabyte.