I wonder whether it is the relative pronoun
Truth be told, I never graduated from college, and this is the closest I've ever gotten to a college graduation.
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In this clip from Steve job's speech in Standford school, I wonder what is the part of "the closest"? Do I see it as the adjective, dropping the pronoun "one"?
I think it should be like this: this is the closest one (that) I've ever gotten to a college graduation.
Right?
If that's the case, should I think "the closest" is basically the object of a verb "have gotten"?
Then, what is the meaning of "get" in here?