Last Time, Previous Time
noun
The before time was last time or the previous time
ぜんかい
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
その活用形は、前回のクラスで学びました。
I learned the conjugated form in the previous class.
前回のプレゼンはダメでしたが、今回は平気だと思います。
The last presentation didn't go well, but I think it will be okay this time.
前回のイベントでは、作家のサインはもらえなかった。
At the last event, I didn't get the writer's autograph.