Ornament, v. t. [imp. & p. p. Ornamented; p. pr. & vb. n. Ornamenting.]
To adorn; to deck; to embellish; to beautify; as, to ornament a room, or a city.
Syn. -- See Adorn.
1 other Webster entry under this spelling
Ornament, n.
That which embellishes or adorns; that which adds grace or beauty; embellishment; decoration; adornment. The ornament of a meek and quiet spirit. 1 Pet. iii. 4. Like that long-buried body of the king Found lying with his urns and ornaments. Tennyson.
Shades of meaning
Fernald has no entry of its own for ornament; he lists it under adorn.
Where he writes about it:
To adorn and to ornament alike signify to add that which makes anything beautiful and attractive, but ornament is more exclusively on the material plane; as, the gateway was ornamented with delicate carving. — from adorn