ob ‧ so ‧ les ‧ cent /ˌɒbsəˈles ə nt◂ $ ˌɑːb-/ BrE AmE adjective formal
[ Date: 1700-1800 ; Language: Latin ; Origin: present participle of obsolescere ; ⇨ ↑ obsolete ]
becoming obsolete
ob ‧ so ‧ les ‧ cent /ˌɒbsəˈles ə nt◂ $ ˌɑːb-/ BrE AmE adjective formal
[ Date: 1700-1800 ; Language: Latin ; Origin: present participle of obsolescere ; ⇨ ↑ obsolete ]
becoming obsolete
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012