A "basic vinaigrette" refers to a simple salad dressing made by combining oil (usually olive) and vinegar, seasoned with salt and pepper. Full definition
Keep things simple with the most basic vinaigrette possible, letting the sweetness of the lettuce shine through. (bonappetit.com)
Go with basic vinaigrettes or get creative with dressings like ginger scallion, Caesar, and fresh avocado fiesta. (greatist.com)
Dressing - Usually a basic vinaigrette that I vary in flavor with different vinegars, mustards, honey, brown sugar or maple syrup, and even different oils. (thisishowicook.com)