Definition 1: A Metaphor to sign away an Individuals state of Freedom.
Definition 2: Within certain religions a delusion of impossibility, because a soul is incapable of being exchanged within a contract, when a soul belongs to the creator of the soul.
Definition 3: A religious belief to exchange a soul within a contract.
Example 1: I required to endure my Mother-In-Laws nagging for my Wife to forgive me, it was like I had to sign away my soul for love.
Example 2: You cannot sign away your soul it is the Property of God.
Example 3: I agreed to a contract with my Master Lucifer to sign away my soul, for a sexy lover.