Refuse, such as waste coal, separated by a screen, A systematic examination or assessment, done especially to detect an unwanted substance or attribute, testing objects or persons in order to identify those with particular characteristics

To view or exhibit in advance, To provide a preliminary sample or overview of, verb_ To show or watch something, or part of it, before it is complete, watch (a movie or play) before it is released to the general public, noun_ a screening for a select audience in advance of release for the general public, an advertisement consisting of short scenes from a motion picture that will appear in the near future, An advance showing, as of a movie or art exhibition, to which a selected audience is invited before public presentation begins

noun a form of entertainment that enacts a story by sound and a sequence of images giving the illusion of continuous movement, A motion picture, Screenings of movies at a public theater