would this sentence be using the word incognito as an adverb or noun?

The superstar went incognito so that she could enjoy her vacation without any autograph signing.

It's an adverb.

http://dictionary.reference.com/browse/incognito

I'd say it's a predicate adjective, modifying "superstar" ... except for that action verb "went."

So, since the verb is not a linking verb, "incognito" has to be an adverb.

http://www.onelook.com/?w=incognito&ls=a

okay, so writeacher, how would I use it as a noun?

The incognito escaped detection by blending into the crowd.

thank you

In the sentence, the word "incognito" is being used as an adverb. To determine this, let's break down the sentence.

"The superstar went incognito so that she could enjoy her vacation without any autograph signing."

In this sentence, "incognito" describes how the superstar went. It modifies the verb "went" by indicating that the superstar went in a way that was disguised or anonymous. Adverbs often answer questions like how, when, where, or to what extent.

If "incognito" were used as a noun, the sentence would require a different structure. For example:

"The superstar's incognito allowed her to enjoy her vacation without any autograph signing."

In this sentence, "incognito" is a noun, representing the state of being disguised or unidentified. It functions as the subject of the sentence.

So, in the given sentence, "incognito" is an adverb modifying the verb "went," describing how the superstar went in a disguised or anonymous manner.