Many attempts have been made to capture the essence of manipulation in a definition, but all have arguably failed. Exploring an alternative strategy, this chapter provides an account of “manipulation” as a cluster concept. Roughly, cluster concepts are characterized by sets of criteria none of which is necessary for the applicability of the cluster concept term; the different subsets of criteria that instantiate the concept are characterized by “family resemblance,” and the more criteria an instance possesses, the closer it is to be prototypical of the concept. The chapter provides a set of ten criteria that participate in the constitution of “manipulation.” They are: intention (kind); intention (intensity); getting into the target’s head; exploiting psychological vulnerability; bypassing or subverting rational control; nontransparency; effect on the target; whether the influence is exercised for the sake of the influencer; making the target a pawn in the influencer’s grand plan; and low baseline expectation of influence. Chapter 2 claimed that the concept “manipulation” is diagnosed perceptually; this fits well with understanding “manipulation” as a cluster concept, since perception determines which combinations of criteria qualify as manipulation.