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

Water is already scarce in the region, and some fear the demands of a mega-water park destination for more than 23,000 people per day could strain Mahahual’s already fragile natural resources. —Natalie Leticia Gallón, Miami Herald, 6 Feb. 2026

As the Homeland Security Department plans to build mega warehouses for immigration detention, lawmakers and government contractors are warning the buildings and crowds could present safety problems. —Marissa Martinez, NBC news, 5 Feb. 2026

Why, as a former mayor of Tehran, demanded in his newspaper last week, do 40 million Iranians live below the poverty line while the state operates mega charitable foundations with billion-dollar budgets ostensibly to help the poor? —Azadeh Moaveni, Time, 3 Feb. 2026

During the events of The Last of Us, the HBO TV adaptation of the mega-popular video games from Naughty Dog, Manny was present in Jackson to assist Abby in the execution of Joel (Pedro Pascal) as a ripple effect from what happened in the season 1 finale. —Nick Romano, Entertainment Weekly, 3 Feb. 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"