canonise means non-Oxford British English spelling of canonize.
Etymology
See canonize; analysable as canon + -ise.
verb
- Non-Oxford British English spelling of canonize.“[T]hat a rhetorician, like Libanius, a Pagan even to madneſs, ſhould think the Chriſtians capable of attempting the life of Julian, is not ſurpriſing. [...] But that an eccleſiaſtical hiſtorian, like Sozomen, ſhould be tempted to canoniſe ſo deteſtable an action, might perhaps not be credited on my aſſertion.”