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

In May, the Nasdaq adjusted its rules to allow for the faster inclusion of mega IPOs like SpaceX into the Nasdaq 100, shortening the window to 15 days from three months before eligibility for inclusion. —John Towfighi, CNN Money, 15 June 2026

Jalen Brunson, a mega WWE fan in his own right, scored 45 points in the clincher on his way to becoming the NBA Finals MVP. —Ryan Gaydos, FOXNews.com, 15 June 2026

The mega watch party is free of charge and runs through July 5, with capacity for 30,000 daily attendees. —Kevin Scott, Miami Herald, 14 June 2026

While not part of the paper’s findings, it might be suggested that the rise of the mega-cap technology companies, which deliver little in the way of physical goods with massive earnings leverage at scale and benefit greatly from network effects, adds to the uncertainty about the size argument. —Bill Stone, Forbes.com, 13 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"