fleuronPronunciation: /ˈflʊərɒn, ˈfləː-/Definition of fleuron noun 1a flower-shaped ornament or motif, used especially on buildings, coins, and books. 2a small piece of puff pastry used for garnishing. Origin: late Middle English: from Old French floron, from flour 'flower'fleuron in other Oxford dictionaries Definition of fleuron in the US English dictionary