Isochoric refers to a process in thermodynamics where the volume of a system remains constant while other properties, such as pressure and temperature, may change. This means that no work is done by or on the system since work is defined as a force applied over a distance, and there is no distance change when volume is constant. An example of an isochoric process is heating a gas in a sealed, rigid container. As the temperature increases, the pressure inside the container also rises, but the volume does not change. This concept is important in understanding the behavior of gases and is often discussed in relation to the ideal gas law.