From WordNet (r) 2.0 (August 2003) [wn]:
flier
n 1: someone who travels by air [syn: flyer]
2: someone who operates an aircraft [syn: aviator,
aeronaut, airman, 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, flyer, throwaway]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Flier \Fli"er\ (fl[imac]"[~e]r), n. [Form Fly, v.; cf.
Flyer]
1. One who flies or flees; a runaway; a fugitive. --Shak.
[1913 Webster]
2. (Mach.) A fly. See Fly, n., 9, and 13
(b) .
[1913 Webster]
3. (Spinning) See Flyer, n., 5.
[1913 Webster]
4. (Arch.) See Flyer, n., 4.
[1913 Webster]
5. An a["e]roplane or flying machine.
[Webster 1913 Suppl.]