A flight path used by aeroplanes.
The trachea.
A passage or avenue for a fluid or flowing substance; specifically, a smoke flue or pipe; the chimney of a steamship or the like.
A utensil in the shape of an inverted hollow cone terminating in a narrow pipe, for channeling liquids or granular material; typically used when transferring said substances from any container into ones with a significantly smaller opening.
To consume (beer, etc.) rapidly through a funnel, typically as a stunt at a party.
To proceed through a narrow gap or passageway akin to a funnel; to condense or narrow.
To channel, direct, or focus (emotions, money, resources, etc.).
To use a funnel.