diadem /ˈdaɪ.əˌdɛm/noun 4verb 1forms 6 noun4 •An ornamental headband worn as a badge of royalty.The Apollon wing of the Louvre has a set of historic crowns, diadems and sovereign jewellery. — 2025 •A crown.I am his first borne sonne, that vvas the last / That vvare the Imperiall Diademe of Rome, […] — 1588 •Regal power; sovereignty; empire—considered as symbolized by the crown. •An arch rising from the rim of a crown (rarely also of a coronet), and uniting with others over its centre. verb1 •To adorn with a diadem; to crown.butt (maomant scoffin, but apoxyomenously deturbaned but thems bleachin banes will be after making a bashman’s haloday out of the euphorious hagiohygiecynicism of his die and be diademmed). — 1939 formsdiadem'd · diademed · diademmed · diademing · diademming · diadems