Definition of "perdurably" []

• In a perdurable manner (adverb)

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• "Reason-Principles which are perdurably valid; by these periods it reverts unfailingly, in the measured stages of defined life-duration, to its established character; it is leading the things of this realm to be of one voice and plan with the Supreme."
• "Of all kinds of nature, human nature is assuredly the best; it is at least the most perdurably interesting."
• "As in the days before men spoke to each other across continents, and the medium of cold type had made the event of to-day the history of to-morrow, so these pilgrims talked through the one medium that alone can give a fact the real essence of freshness -- the ever young, the perdurably charming human voice."