noun. (psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening.
- defense reaction
- defence mechanism
- defence reaction
noun. (mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation.
noun. the cognitive process of making something seem consistent with or based on reason.
- raison d'etre
noun. the organization of a business according to scientific principles of management in order to increase efficiency.
noun. systematic organization; the act of organizing something according to a system or a rationale.
Example sentences of the word rationalisation
1. Noun, singular or mass
Post-purchase rationalisation is the process by which you convince yourself that even when you buy something faulty, useless or overly expensive, it was really a good idea all along.