Something that is just before something that is the final in a series.(noun)
Occurring just before the final in a series.(adjective)
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Use "second-to-last" in a sentence
"They were the second-to-last people in line to meet Giffords."
"The Giants 6-4 haven't run the ball well all year and rank second-to-last in the league in rush yards per game."
""It starts with the offensive line," said left tackle Will Beatty, who was whistled for a crucial false start on the Giants' second-to-last drive, while on the Seattle five-yard line."