/duy"euh dem'/ , n.
1. a crown.
2. a cloth headband, sometimes adorned with jewels, formerly worn by Oriental kings.
3. royal dignity or authority.
v.t.
4. to adorn with or as if with a diadem; crown.
[ 1250-1300; ME diademe ( diadema diádema fillet, band, equiv. to diade- (verbid s. of diadeîn to bind round + -ma n. suffix ]