Aviation Dictionary

On this page you will find a searchable and comprehensive alphabetical list of aviation terms. You can help us make it the most comprehensive list in the world. If we have missed anything, click on the ‘send us your word’ button to send us your word, acronym or definition and we will consider adding it to our dictionary.

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A transponder is a piece of radio equipment in the aircraft that picks up and automatically responds to an incoming signal. Also the pilot can use to  input various codes which ATC can view and track. The code that the pilot inputs is either a generic code , given directly from ATC or is the standard emergency codes if required

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