Volcanic eruption can be classified into three namely Active, Dormant and Extinct volcanoes:
Active Volcanoes are volcanoes that are still and frequently erupting e.g. Cameroon Mountain, Fujuyama in Japan etc.
Dormant Volcanoes are volcanoes that show sign of eruption in future: e.g. St. Helen, Canary Islands and Cape Verde Islands.
Extinct Volcanoes are volcanoes that have not experienced eruption at all but have retained their volcanic features. E.g. Kilimanjaro and Mount Kenya.