Word family noun rationality ≠ irrationality rationale rationalism rationalist rationalization adjective rational ≠ irrational rationalist verb rationalize adverb rationally ≠ irrationally
From Longman Dictionary of Contemporary Englishrationalistra‧tion‧al‧ist /ˈræʃənəlɪst/ noun [countable] LOGICALsomeone who bases their actions on rationalism —rationalist, rationalistic /ˌræʃənəˈlɪstɪk◂/ adjectiveExamples from the Corpus
rationalist• Dad was a rationalist through and through.• His approach was positivist and rationalist and his general objective was to lay down a theory of social evolution.• For example, rationalist, functionalist, and structuralist approaches take such a position.• The extreme rationalist sees the decisions and choices of scientists as being guided by the universal criterion.• His secular, rationalist sensibilities created an ideal of liberalism based on the individual pursuit of self-interest.• The rationalist past and the luminaries of Western humanism have been reclaimed, Marx among them.• The rationalist tendency to take image and concept to be proportionate may explain the reduction. 