Definition

A structure, like a wing or blade, that is shaped to create lift or control movement when it moves through the air.

Example

The engineer designed a new airfoil to improve the aircraft's lift efficiency.

Conversation

I was reading about how an airfoil works in airplanes.

Oh really? What did you find out?

It’s fascinating how the shape of the airfoil affects lift and stability.

That makes sense! It's amazing how design plays such a big role in flying.

Synonyms & Antonyms

Root Explanation

Airfoil is formed from "air" (meaning the invisible gaseous substance surrounding the Earth) and "foil" (from Old French *foille*, meaning leaf or sheet). The word "airfoil" refers to a structure designed to generate lift when air flows over it, resembling a leaf or sheet in its shape.

Memory Tip

Imagine a leaf ('foil') that catches the wind ('air') to lift up — that's how an airfoil works to create lift.

Visually Confused Words