mega

1 of 2

adjective

ˈme-gə 

1

: vast

a mega electronics store

2

: of the highest level of rank, excellence, or importance

a number one hit made her mega

mega-

2 of 2

combining form

variants or meg-

1

a

: great : large

megaspore

b

: greatly surpassing others of its kind

megahit

2

: million (10⁶)

megohm

megacycle

Synonyms of mega

Adjective

• huge
• giant
• gigantic
• massive
• colossal
• vast
• enormous
• tremendous
• mammoth
• monumental
• astronomical
• immense
• bumper
• big
• monster
• titanic

Examples of mega in a Sentence

Adjective

an actor who has become a mega celebrity

I will never understand why people build those mega houses on tiny lots.

Recent Examples on the Web

Adjective

Big Mac and Happy Meal lovers can get their fix on Thanksgiving as majority of the mega chain's locations will be open. —Mandy Taheri, MSNBC Newsweek, 26 Nov. 2025

Analysts have projected that the uninsured rate in Massachusetts could double as a result of the new rules in the federal mega law that tighten Medicaid eligibility. —State House News Service, Boston Herald, 25 Nov. 2025

That divergence traces the tenure of the retailer’s outgoing CEOs and offers a case study on the patience, foresight, awareness and quick reflexes needed to reinvent mega-billion-dollar operations on the fly in a rapidly changing world. —Evan Clark, Footwear News, 25 Nov. 2025

After returning to form last year at the Thanksgiving box office with a mega franchise in Moana 2 after post-Covid misfires Wish and Strange World, Disney has no plans to drop the ball. —Anthony D'alessandro, Deadline, 25 Nov. 2025

Word History

Etymology

Adjective

mega-

Combining form

Greek, from megas large — more at much

First Known Use

Adjective

1968, in the meaning defined at sense 1

Rhymes for mega

• omega

Kids Definition

mega-

combining form

variants or meg-

1

: great : large

megaspore

2

: million : multiplied by one million

megahertz

3

: to the highest or greatest degree

mega-successful

Etymology

Combining form

from Greek megas "large"