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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Above Ground Level (AGL)

The distance measured between the aircraft and any part of the ground. A common use for AGL is for parachuting, where the distance to the ground is more important than the distance above mean sea level. Normally, when on the ground, the altimeter is set to 0 feet, which in most cases will not be the current pressure setting that would normally be set on the altimeter to give AMSL.

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