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

Besides its provocative moniker, there’s a reason the app went mega-viral without spending a dime on advertising — and didn’t even have to pretend to be a buzzy new AI product. —Catherine Thorbecke, Twin Cities, 31 Jan. 2026

The new Kleiner is smaller and more focused than its previous incarnation—more boutique than mega. —Allie Garfinkle, Fortune, 31 Jan. 2026

Sports fans will always find a reason to travel to the next game, which is what makes the upcoming Super Bowl such a mega economic boost for its host destination. —Ramsey Qubein, Forbes.com, 30 Jan. 2026

If Reisner’s statement still holds true, however, the mega-desalination project will be built, leaving Mexico with no appetite for reuse and San Diegans with just more salt in the wound. —Doug Liden, San Diego Union-Tribune, 30 Jan. 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"