Space, time and dimensions of universe extending without end or finiteness.
On a camera lens distance scale, the distance greater than the last finite number, and beyond.
in theory, this is a point that can never be reached, a measureless distance from the lens, in practice, a subject is said to be at infinity when going farther away makes no difference to the focusing of the lens. Understanding Focus
In photographic terms is a distance great enough to be unaffected by finite vibration. In practice this relates to most subjects beyond 1000 meters or in landscape terms, the horizon. When the infinity distance is within the depth of field all objects at that distance or farther will be sharp.
The farthest point upon which a camera can focus, which is roughly 50 feet. When a cameraâ€™s focus is set to infinity, everything that is fifty feet or more from the camera will be sharply in focus.
Focusing point at which the lens gives a sharp image of very distant objects, such as the far horizon.
If the lens is set at it's infinity position (ie. one focal point) then no matter the distance any object can be reproduced sharply and clearly.
(optical) - A distance which is great as compared with the aperture or focal length of an optical system. Six meters (20 feet) the distance used for refraction is over 1000 times the width of the pupil and about 400 times the focal length of the eye. At 6 meters the size of the pupil subtends an angle of less than 4 seconds at the first nodal point.
The farthest distance marked on the focusing ring of the lens, generally about 50 feet. When the camera is focused on infinity, all objects at that distance or farther away will be sharp.
A distance so great that any object at that distance will be reproduced sharply if the lens is set at its infinity position, i.e. one focal length from the film.
The farthest position on the distance scale of a lens.
In relation to camera focus: the horizon.