stir-fry means: Similar to sauteing but using less fat. Food is constantly stirred during cooking and usually prepared in a wok. (in Cooking Dictionary)

What else does stir-fry mean?

Cook quickly on high heat using a little oil. Stir constantly. A wok is often used for this technique. (in Cooking Dictionary)

Fry quickly over medium heat in small amounts of oil, stirring constantly. (in Merlin Dictionary)

This is how fast food can be fried. (in Merlin Dictionary)