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1.
1).A condition existing when two people living in a relationship that becomes so disconnected that they are alone even when they are together.

2). When a person is involved in a relationship with two different people and feels distance with both of them.
1). Although the couple had been married for years, they had grown so far apart from one another they were living in a sort of "Bi-solation."

2). When the man whom thought that he was in love with two women at the same time realized that he wasn't really connecting with either one of them, it occurred to him that he was living in a state of, "Bi-solation."
by Randysandy January 07, 2010