A virtual machine, represented by the symbols 🖥️💻, refers to a software emulation of a computer system that operates within another physical machine. It allows users to run multiple operating systems or applications simultaneously on a single physical device. Virtual machines provide an isolated and secure environment, enabling efficient resource allocation and facilitating tasks such as software testing, development, and deployment. They offer flexibility, scalability, and portability, making them valuable tools for various purposes in the realm of computing.