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

This shift in strategy comes after ICE started buying large warehouses nationwide to turn into mega detention centers. — Jasmine Garsd, NPR, 23 Sep. 2026

The move followed about 20 minutes of public comment, with most being in opposition of the proposal from the mega travel center chain. — Cheryl V. Jackson, IndyStar, 22 Sep. 2026

North Georgia State Fair The North Georgia State Fair offers food, games and more than 40 rides, including a permanent mega slide, cable lift and roller coaster on the fairgrounds. — Mary Caldwell, AJC.com, 22 Sep. 2026

The winning numbers were 9, 11, 12, 14 and 30, with a mega number of 21, the site said. — Don Sweeney, Sacbee.com, 20 Sep. 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"