In this article I consider six definitions of deceiving (that is, other-deceiving, as opposed to self-deceiving) from Lily-Marlene Russow, Sissela Bok, OED/Webster's dictionary, Leonard Linsky, Roderick Chisholm and Thomas Feehan, and Gary Fuller, and reject them all, in favor of a modified version of a rejected definition (Fuller). I also defend this definition from a possible objection from Annette Barnes. According to this new definition, deceiving is necessarily intentional, requires that the deceived person acquires or continues to have a false (...) belief, and must involve the agency of the deceived person; furthermore, the deceiver must know or truly believe that the false belief that the deceived person acquires or continues to have is false. (shrink)