What does an unbridged dictionary provide?

You can look at one at a public library. Call first, if your local branch doesn't have one, they can refer you to another library that does.

You can buy one online from all of the usual booksellers: Amazon.com, bn.com. alibris.com, biblio.com, buy.com and so on.

You can get new and used ones from ebay.com and half.com.