Following Constantine's conversion, Alexandre Christoyannopoulos recounts that Christian pacifism and anarchism were submerged for nearly a millennium until the emergence of thinkers such as Francis of Assisi and Petr ChelÄickÃ½.
noun. verb. The definition of a plume is a feather or a group of feathers, or a cloud of material spreading from its source. 1  A large, full feather from an ostrich that you wear in your hat is an example of a plume.
A mantle plume is a mechanism proposed in 1971 to explain volcanic regions of the Earth that were not thought to be explicable by the then-new theory of plate tectonics. Some such volcanic regions lie far from tectonic plate boundaries, for example, Hawaii.