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

With thousands of furniture pieces constantly on mega sale, Wayfair has become my go-to spot for scoring stylish steals as a seasoned shopping editor. —Mariana Best, Better Homes & Gardens, 16 Aug. 2025

Set in the year 2120, Alien: Earth takes place a few years before the original Alien, with cyborgs and synthetics living among humans and five mega corporations vying for world domination. —Dave Nemetz, TVLine, 6 Aug. 2025

Though Loni Anderson's talent on screen earned her mega success, her life behind the scenes got just as much — if not more — attention. —Christina Dugan Ramirez, FOXNews.com, 4 Aug. 2025

But unlike other recent mega movie-studio mergers — Disney’s swallowing up of Fox, for starters — Skydance has signaled no slowdown in the number of yearly releases. —Chris Lee, Vulture, 31 July 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"