Here's a breakdown:
* mga - the plural marker
* sining - art (singular)
* magaganda - beautiful, fine, or elegant (plural)
* pang-adorno - decorative, ornamental
You can also use the more formal term "mga sining biswal", which translates to "visual arts". This is more specific and commonly used when referring to art forms like painting, sculpture, photography, etc.
Ultimately, the best translation depends on the context and the specific meaning you want to convey.