sandbox
n. countablen. a safe place to test new ideas or software without causing damage to the real system. It can also mean a box filled with sand for children to play in.
n. a virtual environment for executing code or testing software in isolation from the host system. In a broader sense, it refers to a space or context that allows for open-ended experimentation and creative play.
The developer tested the new app in a sandbox first.
Before deploying the security patch to the main server, the IT team ran it in a sandbox to check for bugs.
The game is praised for its sandbox mode, which grants players total freedom to manipulate the environment and craft their own objectives without following a linear story.
From sand + box.
Often used as a modifier before another noun, such as 'sandbox environment' or 'sandbox game'.