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

The university opted for the equivalent of a yard sale, hosting two surplus sales, one around the mega outdoor hockey game against Michigan State in January and another the spring before the Blue-White football game. — Dana O’Neil, CNN Money, 7 Aug. 2026

Pharma’s previous mega-merger wave was largely a response to patent cliffs and weak pipeline replacement, with companies relying on cost cuts to protect earnings. — Elsa Ohlen, CNBC, 6 Aug. 2026

The closures of two of Gagosian’s European locations come during a broader rethink of mega-gallery real estate. — Daniel Cassady, ARTnews.com, 3 Aug. 2026

The legendary Tom Brady was seen all alone riding his $20 million mega yacht around Miami. — Madeleine Marr, Miami Herald, 3 Aug. 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"