n.
       - an upright partition used to divide a room, give shelter, or provide concealment. ▸a windscreen of a motor vehicle. ▸a frame with fine wire netting used to keep out flying insects. 
- the surface of a cathode ray tube or similar electronic device, especially that of a television, VDU, or monitor, on which images and data are displayed. ▸a blank surface on which a photographic image is projected. ▸
(the screen)
 films or television. ▸Photography  a flat piece of ground glass on which the image formed by a camera lens is focused. 
- Printing  a transparent finely ruled plate or film used in half-tone reproduction.
- a system or act of screening for the presence or absence of something.
- a large sieve or riddle.
- Military  a detachment of troops or ships detailed to cover the movements of the main body.
- a part of an electrical or other instrument which protects it from or prevents it causing electromagnetic interference. ▸
(also screen grid)
 Electronics  a grid placed between the control grid and the anode of a valve to reduce the capacitance between these electrodes. 
v.
     - conceal, protect, or shelter with a screen. ▸protect from something dangerous or unpleasant. 
- show (a film or video) or broadcast (a television programme).
- test for the presence or absence of a disease. ▸investigate (someone), typically to ascertain suitability for a job. 
- pass (a substance such as grain or coal) through a large sieve or riddle, especially so as to sort it into different sizes.
- Printing  project (a photograph or other image) through a screen so as to reproduce it as a half-tone.
Derivative
  
    - screenable adj.
- screener n.
- screenful n. (pl. screenfuls) .
- screening n.
 
  Etymology
  ME: shortening of Old North. Fr. escren, of Gmc origin.