This page provides all possible meanings and translations of the word userland
A conceptual space outside the kernel in which a user's applications can run without the risk of damage to the operating system.
The New Hacker's Dictionary
Anywhere outside the kernel. “That code belongs in
userland.” This term has been in common use among Unix kernel
hackers since at least 1985, and may have have originated in that
community. The earliest sighting was reported from the usenet group