I was in a Mexican restaurant with some co-workers recently and noticed that many of them ordered a "burrito." What's the difference between this and a tortilla? I thought that's what they were called.
Depending on where you are, the word tortilla can mean a few different things. In Mexico it refers to a flatbread made of either wheat or corn and a few other ingredients. These flatbreads tend to come in standard sizes in the United States at least, one of which might be labeled the "burrito" size.
A burrito is one use for a tortilla. A burrito consists of a wheat flour tortilla wrapped around a filling. Often the filling might include beans, cooked meat, rice, and perhaps vegetables.
A burrito is usually wrapped in a (flour) tortilla. Tortilla is just the bread; burrito, taco, fajita, etc. is how you use it/what you put in it.
Tortilla is flatbread, burrito is what you do with it.