I've checked it out in
http://onelook.com/
It is not there (or only one dictionary "offers" an empty definition).
Context:
87. Blair et al., 2005. The first
book-length treatment of psychopathy appears to be Cleckley's The Mask of Sanity. While it is currently out of print, this book is still widely referenced and much revered. It is worth reading, if only for the author's highly(and often inadvertently) amusing prose. Hare, 1999, Blair et al., 2005, and Babiak & Hare, 2006, provide more recent book-length discussions of the disorder.