You are correct!
A pirouette is a word to describe a turn on one leg. There are many styles of pirouette in all styles of dance. Typically a pirouette in ballet will be with the legs turned out and in other styles the legs will be in parallel (knees facing forward)
See this video of the two dancers teaching Elmo a pirouette. Can you find some other videos of a pirouette? Could you have a go?