adverb Meaning, Definition & Usage

  1. noun the word class that qualifies verbs or clauses
  2. noun a word that modifies something other than a noun

WordNet

Ad"verb noun
Etymology
L. adverbium; ad + verbum word, verb: cf. F. adverbe.
Definitions
  1. (Gram.) A word used to modify the sense of a verb, participle, adjective, or other adverb, and usually placed near it; as, he writes well; paper extremely white.

Webster 1913