noun

• (uncountable) Mesh material that is used to screen (as in a "screen door").
• The examination and treatment of a material to detect and remove unwanted fractions by passing it through a screen (sieve).
• (in the plural) Material removed by such a process; refuse left after screening sand, coal, ashes, etc.
• (by extension, uncountable) The examination of any material or persons to detect problems through any of various testing, checking, or filtering processes, as:
• (medicine) Identifying cases of a disease in a population of asymptomatic persons.
• (business) Identifying latent unsuitabilities in business propositions, job applicants, or investment opportunities.
• (countable) A test or method used for this purpose.
• The showing of a film, typically by projecting it on a screen.
• (soccer) Shielding.
• (volleyball) Action done by the serving team to prevent the opposing team from seeing the server and the flight path of the ball.