verb. ['ˈræʃənəˌlaɪz'] defend, explain, clear away, or make excuses for by reasoning.
verb. ['ˈræʃənəˌlaɪz'] weed out unwanted or unnecessary things.
verb. ['ˈræʃənəˌlaɪz'] remove irrational quantities from.
verb. ['ˈræʃənəˌlaɪz'] think rationally; employ logic or reason.
verb. ['ˈræʃənəˌlaɪz'] structure and run according to rational or scientific principles in order to achieve desired results.