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
Devices and systems designed to operate across the four dimensions of spacetime, treating time as a manipulable dimension rather than a one-way flow. 4D technologies include temporal browsers (letting you view past and future versions of websites), 4D printers (that print objects which change shape over time—imagine a chair that becomes a table at noon), and the much-anticipated "time-back" button that lets you undo the last five minutes of your life (currently only works for video games, and only sometimes). The holy grail of 4D technology is the "worldline navigator," which would let you see your complete four-dimensional self from birth to death, assuming you want to know how it ends. Most people don't buy it.
Text fits
Save
Cancel