Is 'together' a noun?

http://www.dictionary.com

Look up the word and see what it says about its part(s) of speech.

Let us know what you decide.

It gives the word as either an adverb or adjective; I thought that it might be a collective noun.

That's right ... depending on how it's used in a sentence, it'll be either an adjective or an adverb.

What sentences are you working with?

No, I'm not working with any sentence, I'm just asked if that word alone is a noun or not.

What did you find in the dictionary link that Writeacher posted for you?

I found that it can be an adjective or adverb in the dictionary link, which is right, "together" is not a noun.

Yes, you're right. You'd have saved time and energy by checking the definition an hour or more ago.