What is OS or operating system virtualization? Kindly Explain it with real time example

OS virtualization is running multiple OS concurrently in a single system using a virtualization software such Oracle VM Virtual box.

ℕ𝕒𝕘𝕒𝕣𝕒𝕛_ℍ𝕎ℙ the meaning or the underlying principle remains the same but you can use it in different context.

did u mean virtual os? it just os that run on virtual machine, that acting like a real computer

Avinesh yeah , then what is OS virtualization in cloud computing?