ad•ver•bial(ad vʉr´bē əl, əd) adj.
1 of an adverb
2 having the nature or function of an adverb
3 used to form an adverb [an adverbial suffix]
–n. Linguis. a word or word group that occurs in grammatical functions typical of adverbs (Ex.: the man ate lobster with delight; the man ordered lobster when he had money)
–ad•ver´bi•al•lyadv.