Contemplating Cold

In light of comment recently made on a post, I thought it would be worthwhile to clarify the colloquialism "cold". Cold, as Alexia correctly stated, is the absence of heat. Therefore cold is merely an indication of a lack of flow of energy, occurring due to an absence of a difference in temperature. As you walk outside on a cold day, the atoms in your body give up energy to your surroundings. Your body temperatures tries to reach thermal equilibrium with your surroundings, that thankfully your heart and blood flow counteracts this. It prevents all of your internal energy from being released, but a significant fraction is still expelled, resulting in a sensation that is commonly identified as "cold".