1 (uncountable) The property of being mentally ill; mental disorders taken as a whole.  2006, R. Keith Sawyer, Explaining Creativity: The Science of Human Innovation, Oxford University Press US, ISBN 9780195161649, page 87:
Essay on Gulliver's change throughout Gulliver's Travels - Gulliverâs change throughout Gulliverâs Travels Throughput the book âGulliverâs Travelsâ by Jonathan Swift, the character Gulliver changes many times. During and after part two and four of the book a noticeable change in Gulliver starts to occur.
One way of looking at these crises of interpretation in Gulliver's Travels is to consider them alongside the empirical philosophy of John Locke, of which Swift was critical. In his 'Essay Concerning Human Understanding' (1690), Locke attempted to investigate the formulation and workings of systems of knowledge.