An adverb is a word which qualifies (or adds to) the meaning of a noun?

No, an adverb modifies a verb, adjective, or another adverb, not a noun; an adjective is a word that qualifies a noun. While adverbs typically describe how, when, or where an action occurs, an exception is when words like "even" or "only" can function adverbially to add information about a noun, as in "Even my father disliked his behavior".