# virtual machine

Source: https://englishreference.com/word/virtual-machine
Updated: 2026-08-27

## Senses

### 1. software emulation of hardware

noun · CEFR C1 · Technical

a software program that acts like a real computer, allowing you to run an entire operating system inside your current one.

For teachers: a software implementation of a computer that executes programs like a physical machine, typically running on a hypervisor to isolate it from the host hardware.

- I installed a virtual machine on my laptop so I could test software for a different operating system.
- The IT department migrated the legacy applications to a virtual machine to ensure they remained functional after the server hardware was upgraded.

Usage: Often abbreviated as VM; usually takes the verbs 'run', 'host', or 'spin up'.

### 2. runtime environment

noun · CEFR C2 · Technical

a special software layer that runs code (like Java) so it can work on any type of computer.

For teachers: a process-based software environment that executes bytecode, providing platform independence for high-level programming languages.

- Java programs run inside a virtual machine, which is why they work on both Windows and Mac.
- The language's performance depends heavily on the efficiency of its virtual machine in translating bytecode into native machine instructions at runtime.

Usage: Commonly used in the context of specific languages, such as the Java Virtual Machine (JVM).

## Examples

- I use a virtual machine to run Windows on my Mac.
- Software developers often test their code on a virtual machine to ensure it works across different operating systems without needing multiple physical computers.
- Cloud computing providers leverage virtual machine technology to partition physical server resources among multiple clients, ensuring that each user's data and processes remain strictly isolated from others.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.