Are grease and fat the same?

Grease and fat are related but not the same. Fat refers to a broad category of lipids that can be solid or liquid at room temperature, including animal fats and vegetable oils. Grease, on the other hand, typically refers to the greasy residue left from cooking, often associated with animal fats or oils that have been heated and can become slippery or sticky. In culinary contexts, grease often implies a less desirable, leftover substance, while fat is a more general term for the substance itself.