Wiktionary
a. (context idiomatic English) The same person or thing. (non-gloss definition: Used to emphasize the identity or equivalence of two things).
WordNet
adj. being the exact same one; not any other:; "this is the identical room we stayed in before"; "the themes of his stories are one and the same"; "saw the selfsame quotation in two newspapers"; "on this very spot"; "the very thing he said yesterday"; "the very man I want to see" [syn: identical, one and the same(p), selfsame(a), very(a)]
Usage examples of "one and the same".
Haakon said, unwilling to argue with someone for whom war, politics, and religion were one and the same.
It was said in Mexico that you could leave a roasted pig in the middle of a plaza and unless a rico, a rich man, or a politico, which was one and the same, came by, the pig would be there the next day.
And he cursed at one and the same time his own people who had sent him this Arab and the Arab too who had dared to kill and not man.
And then every pigeon in the city of New York relieved itself at one and the same time with unerring accuracy, fairly drowning Boreas in pigeon dung.
Tageka, trying to apologize and explain, at one and the same time.
From that I conclude that one and the same rock had your living quarters at one end and the pirate base at the other.
Subject and patient (one and the same) has now an agenda (that he believes is his own) and is prepared for level five hypnosis.
For thus will he be able to remain one and the same and unshaken, the single eye of his desire being steadfastly fixed, through the manifold changes of the world, upon Me.