Definition of screener:
(n) :
One who, or that which, screens.
(n) :
A question or survey used to filter potential participants based on some characteristic.
(n) :
An advance screening of a film sent to critics, awards voters, etc.
(n) :
(in combination) A cinema having the specified number of screens.
(n) :
(mining, historical) A person employed to filter the mined coal through a metal screen to remove impurities.