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

Regulators, watching yet another mega-deal reshape a critical industry, should be asking the same question. —Mark Desjardine, Fortune, 8 Jan. 2026

That’s when more mega-sized data centers are expected to come online, at the same time that federal subsidies for clean energy projects will expire. —Claire Hao, Houston Chronicle, 7 Jan. 2026

Their $500 million mega yacht, Koru, was anchored nearby, but the couple reportedly spent most of their time on land. —Lizzie Lanuza, StyleCaster, 6 Jan. 2026

The Roshn Stadium in Riyadh will have a roof resembling shards of crystal, while the Neom Stadium is due to be incorporated into The Line mega city. —Philip Buckingham, New York Times, 5 Jan. 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"