fleuron Syllabification: (fleu·ron)Pronunciation: /ˈflərˌän, ˈflo͝or-/Definition of fleuron noun a flower-shaped ornament, used especially on buildings, coins, books, and pastry. a small pastry puff used for garnishing. Origin: late Middle English: from Old French floron, from flour 'flower'fleuron in other Oxford dictionaries Definition of fleuron in the British & World English dictionary