The ordinal form of the number forty-three, describing a person or thing in position number 43 of a sequence.(noun)
One of forty-three equal parts of a whole.(noun)
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Use "forty-third" in a sentence
""George W. Bush, forty-third president -- forty-third president to not kill bin Laden, that is.""
"In contrast to the second President of the United States, George W. Bush, the forty-third President, clucked to journalist Robert Draper in 2008 that his post-White House plan was "to give some speeches, just to replenish the ol' coffers.""
"He is also the brother of the forty-third president of the United States, George W. Bush."