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

Adjective

• huge
• giant
• gigantic
• massive
• colossal
• enormous
• vast
• tremendous
• mammoth
• monumental
• immense
• astronomical
• bumper
• astronomic
• titanic
• big
• monster
• mighty

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

These mega-popular joggers are 20 percent off in black and red, bringing the price down to just $8 in both colors. —Melony Forcier, PEOPLE, 14 Oct. 2025

Its membership includes theatres of all sizes, from the mega circuits to one-screen theatres in cities and towns around the world. —Pamela McClintock, HollywoodReporter, 14 Oct. 2025

Ken’s dream was to end his 30-year career with a big jump, a big paycheck, and mega stardom. —Matt Grobar, Deadline, 14 Oct. 2025

Scroll on for other staple pieces from the Kate Spade Outlet that are mega-discounted for a limited time, like a stadium-ready clear tote and a glittery shoulder bag. —Mariana Best, Better Homes & Gardens, 11 Oct. 2025

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"