The ordinal number of forty-three in counting order(adjective)
WordNet. Princeton University. 2010.
Use "43rd" in a sentence
"(The one good reason to pass on this race and vote in the Republican primary in the 43rd is if you have a contested PCO race)."
"Today's P-I report says "Primary race in 43rd sets fundraising record" Collectively, Jamie Pedersen, Jim Street, Bill Sherman, Lynne Dodson, Dick Kelley and Stephanie Pure -- the six candidates vying for 43rd District House seat in Seattle being vacated by Rep. Ed Murray -- have raised more than $549,000."
"George W. Bush, the two-term 43rd president of the United States and leader of the free world, is no exception in that regard."