[ra.tio.nal.ize] vb -ized ; -iz.ing vt (1803) 1: to free (a mathematical expression) from irrational parts "~ a denominator"
2: to bring into accord with reason or cause something to seem reasonable: as a: to substitute a natural for a supernatural explanation of "~ a myth" b: to attribute (one's actions) to rational and creditable motives without analysis of true and esp. unconscious motives "rationalized his dislike of his brother"
3: to apply the principles of scientific management to (as an industry or its operations) for a desired result (as increased efficiency) ~ vi: to provide plausible but untrue reasons for conduct -- ra.tio.nal.iz.able adj -- ra.tio.nal.i.za.tion n -- ra.tio.nal.iz.er n