1. A casual occurrence, a happening, or a chance: Erin decided to take a hap by raising her hand when the teacher asked the class a question about Germany, because she lived there with her parents when her father was in the U.S. military.
2. Luck, good fortune: Too many people tend to start projects with haps instead of doing sufficient research to accomplish their objectives.

To exist or to take place by luck: Jan happed the vocabulary quiz by answering 95% of the questions correctly even though she didn't study the words.