Noun

1. the surface manifestation of a plume that rises from deep in the Earth’s mantle
2. a dangerous place of violent political unrest
3. a lively and entertaining place, such as a nightclub
4. an area of radioactive contamination
5. the region of a gene in which there is higher than normal rate of mutation
6. a location in which WiFi Internet access is available
7. a part of an application that consumes a significant amount of execution time
8. Part of a control that responds dynamically as the user moves the pointer over it, as for example in an image map.