Flyer \Fly"er\, n. [See Flier.]

1. One that uses wings.

2. The fly of a flag: See Fly, n., 6.

3. Anything that is scattered abroad in great numbers as a theatrical programme, an advertising leaf, etc.

4. (Arch.) One in a flight of steps which are parallel to each other(as in ordinary stairs), as distinguished from a winder.

5. 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. The fan wheel that rotates the cap of a windmill as the wind veers. --Internat. Cyc.

7. (Stock Jobbing) A small operation not involving ? considerable part of one's capital, or not in the line of one's ordinary business; a venture. [Cant] --Bartlett.

Source: Webster's Revised Unabridged Dictionary (1913)