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. —Julia Harrison, Architectural Digest, 8 Oct. 2025

However, the rise of mega satellite constellations has also sparked concerns from environmental groups and astronomers, who worry that these satellites will generate light pollution and potentially affect the Earth’s atmosphere. —Senior Reporter, PC Magazine, 7 Oct. 2025

Think of it as a mega-sized toiletry bag, makeup bag, and travel pouch rolled into one. —Rosie Marder, Travel + Leisure, 7 Oct. 2025

So for much of the country, KC was the most accessible way to catch the mega-pop star’s show. —Eleanor Nash, Kansas City Star, 5 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"