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

• huge
• giant
• gigantic
• massive
• colossal
• enormous
• vast
• tremendous
• mammoth
• monumental
• immense
• astronomical
• bumper
• astronomic
• titanic
• big
• monster
• mighty

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

Finding more merchants for downtown San Jose is deemed crucial ahead of the potential influx of visitors expected to attend three mega sports events that are slated to occur in the South Bay during 2026. —George Avalos, Mercury News, 10 Sep. 2025

Mount Sinai, the place where God gave Moses the Ten Commandments, is slated to be the location of a mega resort. —Ashley J. Dimella, FOXNews.com, 9 Sep. 2025

That’s no longer the case in this modern NBA era when players sign mega contracts first, then ask questions (or, in some cases, ask to be traded) later. —Barry Jackson, Miami Herald, 9 Sep. 2025

Many detainees have so far been sent to Guantanamo Bay or deported to El Salvador’s CECOT mega prison. —Isabel Rosales, CNN Money, 5 Sep. 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"