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

For months, Wall Street commentators have fretted that the artificial intelligence boom looks like a bubble, with capital spending – which some analysts estimate could reach $3 trillion by 2028 – fattening a few mega-cap firms, while lower-income workers suffer from a slack labor market. —Eva Roytburg, Fortune, 17 Sep. 2025

In the mega airports category, Minneapolis-Saint Paul International Airport came in first place with a score of 660 for the second consecutive year. —Chase Jordan, Charlotte Observer, 17 Sep. 2025

Especially at Waterstones, the UK mega book chain that Daunt stewarded before taking this job. —Brittany Allen, Literary Hub, 17 Sep. 2025

Overall satisfaction increased by 8 points for mega airports, 15 points for large airports and 10 points for medium airports. —Miami Herald, 17 Sep. 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"