next-to-last
1. [ adjective ] next to the last
Synonyms: penultimate
Examples:

"the author inadvertently reveals the murderer in the penultimate chapter" "the figures in the next-to-last column"

Related terms: last
2. [ adjective ] (education) used of the third or next to final year in United States high school or college
Synonyms: junior third-year
Examples:

"the junior class" "a third-year student"

Related terms: intermediate