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

• astronomical
• astronomic
• Brobdingnagian
• bumper
• colossal
• cosmic
• cosmical
• cyclopean
• elephantine
• enormous
• galactic
• gargantuan
• giant
• gigantesque
• gigantic
• grand
• herculean
• heroic
• heroical
• Himalayan
• huge
• humongous
• humungous
• immense
• jumbo
• king-size
• king-sized
• leviathan
• mammoth
• massive
• mighty
• monster
• monstrous
• monumental
• mountainous
• oceanic
• pharaonic
• planetary
• prodigious
• super
• super-duper
• supersize
• supersized
• titanic
• tremendous
• vast
• vasty
• walloping
• whacking
• whopping

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

Initially, Demi Moore was trying to produce a movie version of it, until Pippin composer Stephen Schwartz and producer Marc Platt turned it into a mega global blockbuster, three-time Tony-winning stage musical that became the fourth longest-running Broadway musical ever. —Anthony D'alessandro, Deadline, 28 Apr. 2025

Still, as tariff talks progress, investors are starting to see that demand for AI gear leaves Nvidia less exposed to trade risks than some of its mega cap peers. —Bloomberg, Mercury News, 21 Apr. 2025

Valencia plans to ban mega ships in 2026, and in the Balearic Islands, Majorca is considering new restrictions limiting cruise arrivals to three a day. —Jessica Benavides Canepa, AFAR Media, 17 Apr. 2025

While there was a push to use more renewable energy sources under the administration of former U.S. President Joe Biden, which provided Puerto Rico with mega generators and other resources, experts worry that won't happen under U.S. President Donald Trump. —CBS News, 16 Apr. 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"