What does "openwork" mean?

Any of several forms of metalwork or needlework having decorative openings.

What is a synonym for "openwork"?

Common synonyms include: birdseye, drapery, drawnwork, filagree, filet, filigree.

Pronounced //ˈəʊpənwɜː(ɹ)k//.

/ˈəʊpənwɜː(ɹ)k/ noun

noun ·Rare ·Advanced level

Noun

1
Any of several forms of metalwork or needlework having decorative openings. countable, uncountable
2
ornamental work (such as embroidery or latticework) having a pattern of openings wordnet
3
A quarry; an open cut. countable, uncountable

From open + work.