Adjective : a doctrinaire preacher.    From Dictionary.com. 

This means avoiding even such apparently undoctrinaire measures as 'average annual income' also a Lewis yardstick.    From Wordnik.com.  [ISLAM AND CIVILISATION] Reference

To my ear, "There you go" conveys an inviting friendliness, a good-humored openness, sunny acceptance, undoctrinaire inclusiveness indispensable attitudes for the shopping season.    From Wordnik.com.  [languagehat.com: PHEEVR AND NUNLEY.] Reference

Are these just gratuitous adjectives used to give an impression of weight and authority - because that's what they seem like to an ordinary undoctrinaire and unindoctrinated 'wo/man on the street'.    From Wordnik.com.  [Philocrites: We have no position. Yet.] Reference

He survived, as it happens, for almost that entire period, an elder revered for his stylish jokes and rehabilitated as a repository of undoctrinaire wisdom that could be used against the Thatcherite ideologists.    From Wordnik.com.  [An Unlikely Demon] Reference

Whereas Mrs. Stowe or her fellows would have thought of themselves as writing fiction considerably—or even primarily—for the sake of its moral consequences, Eggleston, having read Taine’s Art in the Netherlands, undertook to portray the life of southern Indiana in the faithful, undoctrinaire spirit of a Dutch painter, and wrote The Hoosier School-Master (1871).    From Wordnik.com.  [Chapter 6. Howells and Realism. Section 1. New Frontiers and Old Settlements] Reference

's new book review, Posner says that Kennedy - who has earned a reputation as an undoctrinaire, swing-vote judge - "delights in gaseous pronouncements", emits "vacuous New Age rhetoric", and that he "tacks to the political winds or votes his ideological fancy.".    From Wordnik.com.  [The Court] Reference