|The Simple English Wiktionary has a definition for: worry.|
Worry is an emotion. It means that one feels stressful or he or she is panicking about something. It is felt as anxiety or concern about a real or imagined issue. Most people experience short periods of worry in their lives, but it is not normally a problem. In fact, a small amount of worrying may even have good effects, if it makes people take precautions or be more careful.