A funnel is an object with a wide, circular top and a narrow short tube at the bottom. Funnels are used to pour liquids into containers which have a small opening, for example bottles.

A funnel is a metal chimney on a ship or railway engine powered by steam.

You can describe as a funnel something that is narrow, or narrow at one end, through which a substance flows and is directed.

If something funnels somewhere or is funnelled there, it is directed through a narrow space.

If you funnel money, goods, or information from one place or group to another, you cause it to be sent there as it becomes available.