Free space (disambiguation)

Free space may refer to:
 * A perfect vacuum, that is a space free of all matter
 * In electrical engineering, free space means air (as opposed to a material, transmission line, fiber-optic cable, etc.):
 * Free-space optical communication is communication by shining light through air
 * Free-space path loss, the spreading-out of light as it travels through 3D space
 * Free-space display is a 3D display projected into the air, often with the help of mist
 * Autonomous free space, community centers in which non-authoritarians enact principles of mutual aid
 * Social centre the free shared space in a community
 * Descent: FreeSpace – The Great War, a space combat simulation computer game
 * The area of a data storage device (for example, a computer disk drive) that is still available for more data storage
 * , the subset of a configuration space where a robot will not collide with obstacles