Skip to main content
Dictionary
Store
Blog
World
Help
Advertise
Chat
System Status
Information Collection Notice
Trademark Concerns
reCAPTCHA Privacy
Terms of Service
reCAPTCHA Terms
Privacy Policy
Accessibility
Report a Bug
Data Request
Contact Us
Security
DMCA
© 1999–2026 Urban Dictionary ®
Mugs
Tees
Hoodies
Pro Customization
Create unique products with your own words and definitions
Preview
Personalize Your Design
Your Word
Your Definition
The most advanced version of the cosmic string theory. M-theory exists in eleven-dimentional hyperspace, where two-branes and five-branes can exist. There are five ways in which M-Theory can be reduced down to ten dimensions, thereby giving us the five known superstring theories, which are now revealed to be the same theory.
Text fits
Save
Cancel