Picker meaning : Agent noun of pick; one who picks. Any user interface control that selects something. A machine for picking fibrous materials to pieces so as to loosen and separate the fibre. The piece in a loom that strikes the end of the shuttle and impels it through the warp. A priming wire for cleaning the vent, in ordnance. (gold panning) A fragment of gold smaller than a nugget but large enough to be picked up. One who removes defects from and finishes electrotype plates. A pilferer.