non-defining
US /ˌnɑːn dɪˈfaɪnɪŋ/
UK /ˌnɑːn dɪˈfaɪnɪŋ/

1.
non-definisi
a non-defining relative clause gives extra information about the noun or pronoun it refers to, but is not essential to the meaning of the sentence. It is usually separated by commas.
:
•
My brother, who lives in London, is a doctor.
Kakak saya, yang tinggal di London, adalah seorang dokter.
•
The book, which was published last year, became a bestseller.
Buku itu, yang diterbitkan tahun lalu, menjadi buku terlaris.