Possible Definitions:
1. Flyer (n.) One that uses wings.
2. Flyer (n.) The fly of a flag: See Fly, n., 6.
3. Flyer (n.) Anything that is scattered abroad in great numbers as a theatrical programme, an advertising leaf, etc.
4. Flyer (n.) One in a flight of steps which are parallel to each other(as in ordinary stairs), as distinguished from a winder.
5. Flyer (n.) The pair of arms attached to the spindle of a spinning frame, over which the thread passes to the bobbin; -- so called from their swift revolution. See Fly, n., 11.
6. Flyer (n.) The fan wheel that rotates the cap of a windmill as the wind veers.
7. Flyer (n.) A small operation not involving ? considerable part of one's capital, or not in the line of one's ordinary business; a venture.