This definition doesn't make any sense. Virtually anything not a solid or gas is a lubricant under atmospheric conditions. Water is one of the best lubricants y

This definition doesn't make any sense. Virtually anything not a solid or gas is a lubricant under atmospheric conditions. Water is one of the best lubricants you can find. "lubricant mixed with a solvent" - doesn't make sense. A solvent is a lubricant. Acetone for example, is a phenomenal lubricant. I'm not sure how you're going to stop it from evaporating, but it's a lubricant. Water is a solvent as well, for example.