the exact meaning is: else but sometime we use it in some other situations! example: دیگه چی؟ what else? دیگه چیزی نمیخای؟ don't you want anything else? دیگه دیر شده! it's late by now! دیگه برو! go now! دیگه اینجوریه! ok, this is it! یه کتاب دیگه هم دارم. i have also another book.

One use is when you explain something to somebody, but you think they must already know it: -مسی تو کدوم تیم بازی می کنه؟ -بارسا دیگه! translation: -Which team does Messi play for? -Clearly Barca!

I add two other examples: 1- i add 2 other examples. = 2 ta mesale dige (digar) ezafe mikonam = دو تا مثال دیگه/ دیگر اضافه می کنم 2- I won't come anymore = dige nemiam = دیگه نمی آم mostly you can use "dige" in sentences with meaning of "more" or "more than this" or "after this point" anyone (else) anymore anything (else)

about other meanings than " other " ( the basic meaning ) it's hard to explain, because no such grammatical rules exist in English