Originally Posted by
Zorak
There's a FlyerTalk Glossary here:
https://www.flyertalk.com/forum/glossary.php
It's based on user submissions, so it may not be up to date, and also each forum/airline tends to evolve it's own specific lingo etc, but that's also what this thread is for
And the lingo can even change over the years. That glossary has “BE” listed as meaning “Business Elite” but “Business Elite” has long since been replaced by “Delta One” so now on DL (and on other airlines that have it), “BE” is now used to mean “Basic Economy” (which is about as opposite as you can get from Business Elite
).