“Doctrinaire (adjective): Characterized by impractical, abstract doctrine or speculative opinion and thus narrow in point of view; rigidly theoretical or parochial, without flexibility or regard to circumstances; stubbornly doctrinal. Adverb: doctrinarily; noun: doctrinairism, doctrinaire, doctrinairian.
‘But there is, for me, a certain softness in her argument, based as it is on a diagnosis of psychology that is both excessively doctrinaire in its remedy and equivocal.’ Susan Sontag, Against Interpretation“
Excerpted from: Grambs, David. The Random House Dictionary for Writers and Readers. New York: Random House, 1990.