Lotion is typically considered a liquid state of matter. It is composed mostly of water along with other ingredients such as oils, emulsifiers, and various active compounds. The liquid form allows lotion to spread easily on the skin and be absorbed effectively.
In more technical terms, lotion can be described as a colloid, which is a mixture where tiny particles of one substance are dispersed throughout another without settling. In this case, the water and oil components create a smooth texture that is easy to apply. The specific formulation of a lotion, including its viscosity and the ratio of water to oils, contributes to how it feels and performs on the skin.