From WordNet (r) 3.0 (2006):
flier
n 1: someone who travels by air [syn: flier, flyer]
2: someone who operates an aircraft [syn: aviator, aeronaut,
airman, flier, flyer]
3: an advertisement (usually printed on a page or in a leaflet)
intended for wide distribution; "he mailed the circular to
all subscribers" [syn: circular, handbill, bill,
broadside, broadsheet, flier, flyer, throwaway]