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

Guests can search for eggs and participate in the over 60 activities available, like the mega slide and skeeball. —Joseph Hernandez, Kansas City Star, 3 Apr. 2026

The 20% year-on-year increase in transaction values resulted in the largest first-quarter haul on record, Bloomberg reported, thanks largely to several mega mergers and acquisitions. —Andrew Edgecliffe-Johnson, semafor.com, 2 Apr. 2026

Big Deal Global M&A surged in Q1 2026, with mega deals—those valued over $10 billion—reaching their highest quarterly count since 2008, according to new research from WTW and Bayes Business School. —Sheryl Estrada, Fortune, 2 Apr. 2026

The consumer goods space has also seen mega deals such as between Kimberly-Clark and Kenvue to bring together brands like Huggies and Kleenex with Band-Aid and Tylenol. —Elsa Ohlen, CNBC, 31 Mar. 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"