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 mega project is located near the famed Giza Pyramids and the Sphinx. —CBS News, 15 Dec. 2025

There was a mega transaction for a hand sanitizer in August, when Church & Dwight bought the Touchland brand for up to $880 million. —Footwear News, 15 Dec. 2025

With two movies on the way, the first entry in the cinematic Demon Slayer saga has sliced its way to mega success and shows no signs of slowing down any time soon. —Destiny Jackson, Deadline, 15 Dec. 2025

The best world for writers—and fans of their work—is the one without mega monopolies. —Brittany Allen, Literary Hub, 10 Dec. 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"