The minotaur represents the bestial nature within every human being. It goes hand in hand with the labyrinth. Aedalus created the Labyrinth to hide the Minotaur from society. This is our repressed, dark and even evil side.
As for what this monster connotes, the Minotaur is most commonly viewed as a symbol of destruction. When Theseus slays the Minotaur, he metaphorically kills death, and so the monster represents evil personified, a dark and terrible beast. According to myth, the labyrinth was built to hide the Minotaur, this aberration of nature, to hide the scandalous evidence of its birth.
The similarities between the labyrinth and Dante’s Hell, with its concentric rings guarded by Lucifer at the centre, are abundantly clear.