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 624-foot Evrima, which is the first in a fleet of three ships emerging over the next few years, is an antidote to mega cruises that still feels massive to anyone who’s ever truly yachted. —Condé Nast, Condé Nast Traveler, 11 Apr. 2026

Those included mega brands, cosmetics, hair products, commercials and shoots. —Merle Ginsberg, HollywoodReporter, 10 Apr. 2026

Fundamentals Alphabet continues to demonstrate one of the strongest financial profiles among mega-cap technology companies. —Tony Zhang, CNBC, 8 Apr. 2026

The singer-songwriter marked his return to The Voice as a season 29 mega mentor and as the official judge for the brand-new All-Star competition. —Daniela Avila, PEOPLE, 7 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"