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

Adjective

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

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

The driver behind these gains in retail EV sales is the mega-tax bill signed into law in July. —Jamie L. Lareau, Freep.com, 3 Sep. 2025

The valuation of the mega deal was not disclosed. —Brent Lang, Variety, 2 Sep. 2025

With the stock market increasingly driven by passive investing and indexing, and dominated by a handful of mega-tech stocks, investors seeking diversification will need to start turning to the rapidly expanding private markets, Rowan told CNBC. —Robert Frank, CNBC, 2 Sep. 2025

Smaller farmers were the norm, whereas today much of our agricultural industry has been consolidated to mega corporations that care first and foremost about churning out supply. —The Editorial Board, Chicago Tribune, 31 Aug. 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"