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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Straight and Level (S&L)

The phase of flight that makes up the majority of all flight. This is achieved by flying in a given direction at a constant altitude. The attitude of the aircraft can vary significantly based on the speed at which S&L is being maintained.

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