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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Instrument Landing System. This is a very accurate instrument approach which gives guidance in both the vertical (glideslope) and horizontal (localizer) planes. The benefits of this system over other navaids is that the minimum altitude for a Missed Approach is much lower than that of an NDB or VOR.

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