Wiktionary
potato salad
n. A salad made from chopped boiled potatoes and a variety of other ingredients in a dressing
WordNet
potato salad
n. any of various salads having chopped potatoes as the base
Wikipedia
Potato salad
Potato salad is a dish made from boiled potatoes that comes in many versions in different regions of the world.
It is a popular menu choice of cooks preparing food for a large number of people, because it is easily made in large quantities, can be prepared in advance then refrigerated until needed, and requires inexpensive ingredients.