extension noun definition in Communication devices topic from the Oxford Advanced Learner's Dictionary


 noun: Communication devices topic
[countable] (abbreviation ext.) an extra telephone line connected to a central telephone in a house or to a switchboard in a large building. In a large building, each extension usually has its own number We have an extension in the bedroom. What's your extension number? Can I have extension 4332 please?

Explore other topic groups related to Communication devices