So why, when you click on it, does it tell you that "momento" means time?
I don't understand how this particular sentence can be a part of the lessons on "Adverbs". At all.
So would you only use "basso" in terms of size and "breve" just for things that have to do with time?
I believe it only has one form in the singular: breve, plural brevi like all adjectives ending in -e.
Yes, I think 'corto' refers to the physical length of things, like a coat or dress while 'breve' refers to the length of time -- think 'brief' as a cognate which refers to time and wouldn't be used to describe the length of garments for example.
Unless you're talking about "briefs", which are about as short as possible! :P