1. Another term (especially in the UK) for shield
2. Often called a windscreen
. This is a foam (or foam with metal frame) surround that goes around a microphone
element to help diminish the sound created by moving wind, sibilant or popping vocal phrases.
3. Projection screen, a surface onto which an image is projected.
4. Transitive verb: To filter. "Human Resources will screen the applicants before passing them on to the TD