c.1380, from O.Fr.
doctrine (12c.), from L.
doctrina "teaching, body of teachings, learning," from
doctor "teacher" (see
doctor). The
Monroe Doctrine in U.S. history was first used 1848, in reference to principles of policy contained in the message of President Monroe to Congress on Dec. 2, 1823.
Doctrinaire "one who tries to apply some doctrine without regard for practicality" was borrowed from Fr. 1820; in France, originally of those who tried to reconcile liberty with royal authority after 1815; the broader sense in Eng. is attested from 1831.