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

The Hudson Theatre lends a mega-church vibe to the proceedings, but the spirits of theatergoers are nonetheless moved. —Theater Critic, Los Angeles Times, 13 Mar. 2026

Kast has praised the crime-fighting tactics of Bukele, even touring El Salvador's 40,000-capacity mega prison last year. —Arkansas Online, 12 Mar. 2026

The ground-floor room, Snowdrop, is fully accessible; Buttercup is the mega primary suite with its own balcony; and Willow is the smallest. —Condé Nast, Condé Nast Traveler, 12 Mar. 2026

The tech industry's mega AI push has led to a shortage of memory chips in the broader market, which means that Meta's ambitious silicon roadmap could face future supply chain constraints. —Katie Tarasov,jonathan Vanian, CNBC, 11 Mar. 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"