Solubility is the property of a substance, known as a solute, to dissolve in a solvent, forming a homogeneous solution at a specified temperature and pressure. It is often expressed in terms of concentration, such as grams of solute per liter of solvent. Factors influencing solubility include temperature, pressure, and the chemical nature of the solute and solvent. Different substances have varying solubility in different solvents, which is crucial in fields like chemistry, Biology, and pharmaceuticals.