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

The mega retailer's annual shopping event for Prime members offers steep discounts on everything from robot vacuums and Amazon devices to mattresses and couches. —Audrey Lee, Architectural Digest, 30 June 2025

Instead, combine mega job boards with specialized and emerging platforms to maximize your reach. —Caroline Castrillon, Forbes.com, 29 June 2025

Abrego Garcia is the Salvadoran native whom the government mistakenly deported to a mega prison in El Salvador. —Brittney Melton, NPR, 26 June 2025

Oyun-Erdene had earmarked 14 new mega projects to boost economic growth, including a major expansion of renewable energy and cross-border railway connections with China, which receives 90% of Mongolian exports. —Charlie Campbell, Time, 13 June 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"