If you are very happy, you can say "au septième ciel".
This refers to ancient times when people believed that planets were each surrounded by their own sky and the 7th sky was beyond Saturn, where gods were supposed to live. So, being in the 7th sky was the closest to gods, hence a feeling of ultimate happiness.
So that I have this straight. "En Haut" is an adverbial phrase meaning "upstairs" and "là-bas" means "downstairs". Am I correct? Do either of these phrases change with gender or number ( of person or thing upstairs or downstairs )? I can't recall seeing them in any of our lessons.
Merci George. La liste est simplement plusieurs définitions, pas nécessairement toutes les définitions qui vous faut. The drop-down is simply to showcase the main definitions, not necessarily will all of them work in that particular phrase. I recommend investing in a good dictionary to help select the right word for the context.