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

The 22-deck mega ship packs in one of the largest kids clubs at sea, plus bumper cars, roller skating, waterslides, a ropes course, and the Cliffhanger—the cruise industry’s first overwater swing ride. —Ashlea Halpern, Condé Nast Traveler, 25 May 2026

Large ocean cruise ships and mega ships attract families, multi-generational groups, couples, and groups of friends who love the variety of restaurants, bars, attractions, shows, and value. —Patricia Doherty, Travel + Leisure, 24 May 2026

Jiang, Vayanos, and Zheng (2025), in the Review of Financial Studies, confirm that passive flows disproportionately raise the prices of the index’s largest members—a structural bias toward overvaluation for mega-cap index constituents. —Shivaram Rajgopal, Forbes.com, 24 May 2026

Rolfo | Moment | Getty Images This summer, mega artist Harry Styles will take the stage at Madison Square Garden in New York City for an exclusive 30-show residency – his only planned stop in the country and a show that's garnered intense attention since its announcement. —Laya Neelakandan, CNBC, 23 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"