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

Many of our favorite listings go on mega sale, including this 69 percent-off Rockland Melbourne Large Suitcase. —Caroline Hughes, Travel + Leisure, 26 Apr. 2026

Along the way, a young Michael meets (and wows) music industry legends like Berry Gordy (Larenz Tate) and Quincy Jones (Kendrick Sampson) and embarks on his mega-successful solo career. —Tommy McArdle, PEOPLE, 26 Apr. 2026

The winning numbers were 1, 6, 8, 23 and 38, with a mega number of 22, the site said. —Don Sweeney april 26, Sacbee.com, 26 Apr. 2026

Set the scene After touching down in Xiahe, a tiny airport about an hours’ flight north of Chengdu, China’s mega-city sprawl couldn’t feel further away. —Condé Nast, Condé Nast Traveler, 25 Apr. 2026

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"