Meaning of ADVERBIAL in English

ADVERBIAL

ad ‧ ver ‧ bi ‧ al /ədˈvɜːbiəl $ -ɜːr-/ BrE AmE adjective technical

used as an adverb:

an adverbial phrase

—adverbial noun [countable]

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.