the cognitive process of making something seem consistent with or based on reason; rationalisation
(psychiatry) a defense mechanism by which your true motivation is concealed by explaining your actions and feelings in a way that is not threatening; rationalisation
(mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equation; rationalisation
the organization of a business according to scientific principles of management in order to increase efficiency; rationalisation
A reorganization of a company in order to increase its efficiency. This reorganization may lead to an expansion or reduction in company size, a change of policy, or an alteration of strategy pertaining to particular products.
Investopedia Says:
Similar to a reorganization, a rationalization is more widespread, encompassing strategy as well as structural changes.