expression
feeling as if in a dream; dream or reality
Set phrase expressing a state where one cannot distinguish between dream and reality, often used when something feels surreal or too good to be true.
合格発表を見たときは、夢か現かと思った。
When I saw the exam results, I felt as if I were dreaming.
彼女が突然現れて、夢か現か分からなかった。
She appeared so suddenly that I couldn't tell if it was a dream or reality.