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

But that was little comfort to tech investors, who are concerned that short-term inflation will increase the debt burden of mega-cap companies that have borrowed large amounts of money to fund their artificial intelligence infrastructure. — Rob Wile, NBC news, 22 June 2026

SpaceX came public with only about 5% of its roughly 13 billion shares available for trading, creating one of the smallest floats among mega-cap stocks. — Yun Li, CNBC, 22 June 2026

The scenery is everywhere, and gets mega-colorful as fall closes in. — Scott Kramer, Forbes.com, 21 June 2026

Exciting infrastructure plans are afoot in Europe also, as a number of audacious underground mega tunnels are redrawing the railway map of the continent. — Maureen O'Hare, CNN Money, 20 June 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"