Source : Webster's Revised Unabridged Dictionary (1913)

Moving picture \Moving picture\
   A series of pictures, usually photographs taken with a
   special machine, presented to the eye in very rapid
   succession, with some or all of the objects in the picture
   represented in slightly changed positions, producing, by
   persistence of vision, the optical effect of a continuous
   picture in which the objects move in some manner, as that of
   some original scene. The usual form of moving pictures is
   that produced by the cinematograph.

Source : WordNet®

moving picture
     n : a form of entertainment that enacts a story by a sequence of
         images giving the illusion of continuous movement; "they
         went to a movie every Saturday night"; "the film was shot
         on location" [syn: {movie}, {film}, {picture}, {moving-picture
         show}, {motion picture}, {motion-picture show}, {picture
         show}, {pic}, {flick}]