Possible Definitions:
1. Sticker (n.) One who, or that which, sticks; as, a bill sticker.
2. Sticker (n.) That which causes one to stick; that which puzzles or poses.
3. Sticker (n.) In the organ, a small wooden rod which connects (in part) a key and a pallet, so as to communicate motion by pushing.
4. Sticker (n.) Same as Paster, 2.