in·vis·i·ble /inˈvizəb(ə)l/ adjective 1. unable to be seen; not visible to the eye. & space /spās/ noun 1. a continuous area or expanse that is free, available, or unoccupied. 2. the dimensions of height, depth, and width within which all things exist and move. verb 1. position (two or more items) at a distance from one another. 2. informal be or become distracted, euphoric, or disoriented, especially from taking drugs; cease to be aware of one's surroundings.