This article doesn’t take a position on the question what is the best way to define Basic Income. Instead, it argues that a family of related concepts are identified by two crucial questions: is the concept restricted to a non-means-tested grant delivered to high- and low-income people alike? And is it restricted to a grant that is large enough to live on? Although we can’t get away from the question of exactly how do we define Basic Income, controversies about the family of related concepts identified by these two questions cannot be resolved by any organization clarifying its definition of Basic Income. This family of closely-related concepts have been and will continue to be used in the discussion of policy options along the lines of an unconditional cash payment. The best service a discussion over the definition of Basic Income can do is to try to suggest terms that can be used by people on all sides of the debate so that they can more easily discuss their differences clearly and respectfully. Therefore, the goal of this paper is to identify the various concepts that need to be clearly identified so that everyone in the discussion can understand each other.