プログレッシブ和英中辞典(第4版)の解説
ぜんげつ【前月】
❶〔前の月〕the previous month
彼はその前月に帰国した
He had come home the previous month.
死の前月に私は彼を訪ねた
I called on him the month before his death.
❷〔先月〕
前月からの繰越金が3万円ほどある
There is about thirty thousand yen carried over from last month.