(physics) Any of several instruments used to measure various aspects of the intensity of light.

(astronomy) To measure some aspect of light (from a star) using a photometer.

A large photograph (or series of photographs) used as a wall decoration.

The identification, description and measurement of objects in photographs, especially in aerial photographs, for geologic, cartographic or military purposes

(dated) A photocopy, especially one made by a Photostat machine. / (Malaysia, Philippines) A photocopy made using a photocopier.

(transitive) To make such a photocopy of.

(cinematography) The phase of film production during which the film is actually shot, as distinct from pre-production and post-production.

Relating to xerography / (biochemistry) Relating to photostasis

plural of photovoltaic cell

plural of photographic memory