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

At 28, McDavid could go with a four-year deal at a lower amount and still be in line for another mega contract. —Eric Stephens, New York Times, 1 Oct. 2025

Comments the host made after the murder of right wing activist and influencer Charlie Kirk angered MAGA supporters and saw the nation’s largest station group, Nexstar – which has its own mega merger up for review at the FCC – preempt the late night staple. —Jill Goldsmith, Deadline, 30 Sep. 2025

Warren has played shows with mega pop stars, including at the VMAs, Coachella and Stagecoach. —Kristen Wisneski, Billboard, 29 Sep. 2025

This mega facility will cover an area of more than 108,000 square feet (10,000 square meters) and will generate over 6 million data points every year. —Christopher McFadden, Interesting Engineering, 27 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"