Thousand Island dressing is an American salad dressing and condiment based on mayonnaise that can include olive oil, lemon juice, orange juice, paprika, Worcestershire sauce, mustard, vinegar, cream, chili sauce, tomato purée, and ketchup or Tabasco sauce.
It also typically contains finely chopped ingredients, which can include pickles, onions, bell peppers, green olives, hard-boiled egg, parsley, pimento, chives, garlic, or chopped nuts (such as walnuts or chestnuts).