Definition: taking place before the last part or event
Part of Speech: Adjective
Synonym(s): but one, next-to-last
Antonym(s): first, initial
1. If the team is losing badly, many fans will leave during the penultimate minutes of the game.
2. After reading the final book of the series, I was so disappointed I wished the writer had ended with his penultimate novel.
3. Since we lost the penultimate game, we won't play in this year's finals.