Under normal circumstances, a key matches a lock and a keyhole, so dreaming of a keyhole represents your confusion about your inner and outer self.
Dreaming of peeking through a keyhole indicates that your insight and understanding have regressed. In traditional dream interpretation, the keyhole is a symbol of femininity. The regression mentioned earlier may be caused by views on women.
Dreaming of a man dreaming of a key signifies that the dreamer’s career will make a big leap, perhaps reaching heights that were previously unexpected.
Dreaming of a woman dreaming of a key suggests that the dreamer will soon meet their true love, and perhaps they will get married soon.
Dreaming that a key is lost indicates that the dreamer is facing obstacles that are difficult to overcome. What you need is some skill, not brute force, so do not give up easily.