Di"a*dem (?), n. [F. diademe, L. diadema, fr. Gr. , fr. to bind round; through, across + to bind; cf. Skr. da to bind.]

1.

Originally, an ornamental head band or fillet, worn by Eastern monarchs as a badge of royalty; hence (later), also, a crown, in general.

"The regal diadem."

Milton.

2.

Regal power; sovereignty; empire; -- considered as symbolized by the crown.

3. Her.

An arch rising from the rim of a crown (rarely also of a coronet), and uniting with others over its center.

[Diadem lemur]. [Zoology|Zool.] See [Indri]. -- [Diadem spider] [Zoology|Zool.], the garden spider.

© [Webster 1913].

Di"a*dem, v. t.

To adorn with a diadem; to crown.

Not so, when diadem'd with rays divine. Pope.

To terminate the evil, To diadem the right. R. H. Neale.

© [Webster 1913].

diadem (definition)