Constructive possession refers to a legal concept where a person does not have physical control over an item but still has the power and intention to control it. This means that even if someone is not holding or directly using an item, they can still be considered to possess it if they have the ability to access it. For example, if a person has a gun stored in their home but is not currently holding it, they may still be charged with possession if they have the keys to the home and the intent to use the gun. Constructive possession is often used in legal cases involving drugs or stolen property.