mega

adjective2

1. •
   (informal) Very large.

   • Follow those in the know to the fifth floor of Sega's Joy Polis, a mega indoor amusement park that's part of the Odaiba Decks Tokyo Bay entertainment complex near Tange's Fuji Television building. — 2004
2. •
   (slang) Great; excellent.

   • July 15, 2011, Liam Gallagher, quoted at the launch of the new Manchester City F.C. kit I've been a City fan since I was a kid, so to be involved with the launch of a new kit is colossal. Manchester City fans are known for having a lot of style and the new shirt looks mega.

noun2

1. •
   (informal) A megararity (extremely rare bird for a certain region).
2. •
   The Steinhaus-Moser number ②

adverb1

1. •
   (informal) Extremely.

noun2

1. •
   Initialism of Moon-Earth gravity assist.
2. •
   Initialism of Mars-Earth gravity assist.

phrase1

1. •
   Initialism of Make Europe Great Again.