The phrase "what is" is commonly used as the beginning of a question asking for the definition, explanation, or meaning of something. It can be the start of inquiries into various topics, concepts, or objects. For example, "What is love?" could ask for a definition or explanation of love, while "What is risk management?" asks about the process of handling risks. If you were looking for a specific definition or explanation starting with "what is," please clarify the full phrase or topic you want to know about, and I can provide detailed information accordingly. For instance, popular queries include "What is love?" (referencing the famous song by Haddaway and its meaning) or "What is risk management?" (explaining the business process of managing risks). Let me know your precise question!