volcanic Meaning, Definition & Usage

  1. adjective relating to or produced by or consisting of volcanoes
    • volcanic steam
    • volcanic islands such as Iceland
    • a volcanic cone is a conical mountain or hill built up of material from volcanic eruptions
  2. adjective satellite explosively unstable
    • a volcanic temper
  3. adjective satellite igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt
    • volcanic rock includes the volcanic glass obsidian

WordNet

Vol*can"ic adjective
Etymology
Cf. F. volcanique, It. vulcanico.
Definitions
  1. Of or pertaining to a volcano or volcanoes; as, volcanic heat.
  2. Produced by a volcano, or, more generally, by igneous agencies; as, volcanic tufa.
  3. Changed or affected by the heat of a volcano.

Webster 1913