Volcano is a common geomorphic form, which is formed by the accumulation of underground molten material and its solid debris. Volcanoes have a long history. Some volcanoes erupted before human history, but no longer active, such volcanoes are called "dead volcanoes".

The volcanoes that have erupted in history, but have been in a relatively static state for a long time, all these volcanoes have well preserved cone shape, still have volcanic activity ability, or can not be determined that they have lost the volcanic activity ability, people call them "dormant volcano"; since the history of mankind, volcanoes that erupt from time to time are called "active volcanoes".

Source: @trubach_tattoo