0 a word that describes or gives more information about a verb, adjective, adverb, or phrase: --
In the phrase "the house was spotlessly clean", the word "spotlessly" is an adverb.
In the phrase "she smiled cheerfully", the word "cheerfully" is an adverb.
1 a word that describes or gives more information about another word, esp. a verb, adjective, or other adverb, or about a phrase: --
In the sentences, "She smiled cheerfully" and "He waited right outside the door," "cheerfully" and "right" are adverbs.
Presumably the same holds for manner adverbs, although it is not mentioned in the text.
On this basis it is argued that non-complex complement adverbs have to raise to an appropriate specifier.
Over the years, adverbs have been analysed as complements, specifiers, and adjuncts which can branch freely to the left and to the right.
In actual conversation, however, various constituents such as subject, object, and adverb may occur in post-predicate position.
On one or two occasions he has even ventured beyond the customary conjunctions to use the conjunctive adverb however.
Ordering restrictions are not attributed to the obligatory sequence of functional heads but to semantic interactions among the adverbs.
The terminology referring to these types of adverbs is not entirely uniform among scholars.
He argues that, although commonly adopted in much of the current linguistic literature, they are by no means always clearly distinguishable from adverbs.