fli·er / ˈflīər/ (also fly·er) • n. 1. a person or thing that flies, esp. in a particular way: a nervous flier. ∎ a person who flies something, esp. an aircraft. ∎ inf. a fast-moving person or thing. 2. a small handbill advertising an event or product. 3. a speculative investment. 4. a step in a straight flight of stairs. PHRASES: take a flyer take a chance.