This is the 6587th most frequent Polish word.
deja
The Polish word "deja" does not exist as a standalone noun or common word. If you mean "déjà" (from French "déjà vu"), it refers to the feeling of having already experienced something.
'Deja' is used in a figurative sense to denote a repeated thought or feeling.
Mam pragnienie spróbować tego ponownie, mam deja w mojej głowie.
I have a desire to try this again, I have a deja in my head.
'Deja' is part of the expression 'deja vu,' referring to the feeling of having already experienced something.
To miejsce wygląda znajomo; czyż to nie deja vu?
This place looks familiar; isn't it deja vu?
'Deja' is creatively used to describe a recurring experience or situation.