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

What to know about SuperLotto Plus To score a jackpot in SuperLotto Plus, a player must match all five numbers and the mega number. —Don Sweeney, Sacbee.com, 10 May 2026

Called the Zipang, this mega ship would have weighed in at an incredible 500,000 tonnes, dwarfing anything afloat then or since. —Christopher McFadden, Interesting Engineering, 7 May 2026

The song is a mega hit that's resonated with listeners well beyond the Flyers' fanbase. —Marcella Baietto, CBS News, 7 May 2026

Thatcher plays disfigured, suicidal young protagonist P Burke who is hired by a mega tech corporation to virtually operate a beautiful but brainless ‘flesh body’ called Delphi, grown in a lab with the sole purpose of influencing the masses and selling products. —Melanie Goodfellow, Deadline, 6 May 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"