Definitions for: Adverbial

[n] a word or group of words function as an adverb
[adj] of or relating to or functioning as an adverb; "adverbial syntax"

Webster (1913) Definition: Ad*ver"bi*al, a. [L. adverbialis: cf. F. adverbial.]
Of or pertaining to an adverb; of the nature of an adverb;
as, an adverbial phrase or form.

See Also: adverb