Screen \Screen\ (skr[=e]n), v. t. [imp. & p. p. Screened; p.
   pr. & vb. n. Screening.]
   1. To provide with a shelter or means of concealment; to
      separate or cut off from inconvenience, injury, or danger;
      to shelter; to protect; to protect by hiding; to conceal;
      as, fruits screened from cold winds by a forest or hill.
      [1913 Webster]

            They were encouraged and screened by some who were
            in high commands.                     --Macaulay.
      [1913 Webster]

   2. To pass, as coal, gravel, ashes, etc., through a screen in
      order to separate the coarse from the fine, or the
      worthless from the valuable; to sift.
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   3. to examine a group of objects methodically, to separate
      them into groups or to select one or more for some
      purpose. As:
      (a) To inspect the qualifications of candidates for a job,
          to select one or more to be hired.
      (b) (Biochem., Med.) to test a large number of samples, in
          order to find those having specific desirable
          properties; as, to screen plant extracts for
          anticancer agents.
          [PJC]