Learn the meaning, pronunciation and usage of the word incident in English. Find out how to use incident in different contexts, such as accidents, crimes, disagreements or unusual events. INCIDENT definition: 1. an event that is either unpleasant or unusual: 2. with nothing unpleasant or unusual happening…. Learn more. Incident definition: Something contingent on or related to something else. Contrary to what you may think, Accidents and Incidents in a workplace aren’t the same. Learn the main differences in this blog post.