The Collaborative International Dictionary of English v.0.48:

Funnel \Fun"nel\, n. [OE. funel, fonel, prob. through OF. fr, L.
   fundibulum, infundibulum, funnel, fr. infundere to pour in;
   in in + fundere to pour; cf. Armor. founil funnel, W. ffynel
   air hole, chimney. See Fuse, v. t.]
   1. A vessel of the shape of an inverted hollow cone,
      terminating below in a pipe, and used for conveying
      liquids or pourable solids into a vessel with a narrow
      opening; a tunnel.
      [1913 Webster]

   2. A passage or avenue for a fluid or flowing substance;
      specifically, a smoke flue or pipe; the iron chimney of a
      steamship or the like.
      [1913 Webster]

   Funnel box (Mining), an apparatus for collecting finely
      crushed ore from water. --Knight.

   Funnel stay (Naut.), one of the ropes or rods steadying a
      steamer's funnel.
      [1913 Webster]

WordNet (r) 3.0 (2006):

funnel
    n 1: a conical shape with a wider and a narrower opening at the
         two ends [syn: funnel, funnel shape]
    2: a conically shaped utensil having a narrow tube at the small
       end; used to channel the flow of substances into a container
       with a small mouth
    3: (nautical) smokestack consisting of a shaft for ventilation
       or the passage of smoke (especially the smokestack of a ship)
    v 1: move or pour through a funnel; "funnel the liquid into the
         small bottle"