At Bottom Meaning
(idiomatic) Really, basically, fundamentally.
Example: 1705, Daniel Defoe, The Consolidator: or, Memoirs of Sundry Transactions From the World in the Moon:
They concerted Matters, and all at once fell to selling off their Stock, giving out daily Reports that they would be no longer concern'd, that it was a losing Trade, that the Fund at bottom was good for nothing.
1883, Robert Louis Stevenson, Treasure Island, ch. 16:
I know you are a good man at bottom.
1907 July 5, Mark Twain, Chapters from My Autobiography, ch. 23:
At bottom I supposed that he had mistaken another book for mine.
1947 Jan. 6, "The 80th Congress," Time (retrieved 26 June 2015):
As the New Year opened, the survival of Western democracy rested, at bottom, on the case the U.S. would make for it.
2015 June 20, Michael Lewis, "Harvard Admissions Needs â€˜Moneyball for Lifeâ€™," New York Times (retrieved 26 June 2015):
At bottom, he does not accept any authority higher than himself.