Onion/ˈʌnjən/ Definition 1 of 3Pro Tip 1/3Culinary Staple Onions are foundational in cooking, often starting many recipes. First, sauté the onions until they're translucent. Pro Tip 2/3Flavor Enhancement Onions add depth to dishes and are used raw or cooked. The soup tasted better after adding some onion. Pro Tip 3/3Emotional Response Cutting onions can cause tears due to released chemicals. She was crying while cutting the onion.