bract Syllabification: (bract)Pronunciation: /brakt/Definition of bract noun Botany a modified leaf or scale, typically small, with a flower or flower cluster in its axil. Bracts are sometimes larger and more brightly colored than the true flower, as in a poinsettia. Derivatives bracteatePronunciation: /-tēit, -tēˌāt/ adjective Origin: late 18th century: from Latin bractea 'thin plate of metal'bract in other Oxford dictionaries Definition of bract in the British & World English dictionary