Definitions taken from "Collaborative Learning using Concept Mapping," by Patricia Lupion Torres & Rita de Cassia Veiga Marriott
What is Mind Mapping or Concept Mapping?
A mind map or mind-map is a pictorial representation of how a central concept is linked to other concepts and issues. There are no formal restrictions on the kinds of links used in a mind map. Most often, a mind map involves color or monochrome images, words, and lines. The elements are arranged intuitively according to the importance of the concepts, and they are organized into groupings, branches, or areas. A person who is making a mind map is encouraged to use radiant thinking (from the word radiate, meaning to spread or move in two directions). Radiant thinking is a process that proceeds from or connects to a central point. Mind maps are external expressions of radiant thinking.