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.
Definition of plume for Students. 1  1 : a large or showy feather of a bird. 2  2 : an ornamental feather or tuft of feathers (as on a hat) 3  3 : something shaped like a large feather a plume of smoke.