ダブるto be duplicated, to be repeated, to overlap, to fall together (of dates, etc.), to coincide, to repeat (a failed course, school year, etc.), to make a double play, to make a double fault (in tennis)

他(ほか)の記事(きじ)と内容(ないよう)がダブっている記事(きじ)を消(け)す。

Delete the articles that have content overlapping with other articles. {to be duplicated, to be repeated, to overlap, to fall together (of dates, etc.), to coincide, to repeat (a failed course, school year, etc.), to make a double play, to make a double fault (in tennis)}

単位(たんい)が足(た)りなかったから、一(いち)年(ねん)ダブることになった。

I didn't have enough credits, so I had to repeat a year. {to be duplicated, to be repeated, to overlap, to fall together (of dates, etc.), to coincide, to repeat (a failed course, school year, etc.), to make a double play, to make a double fault (in tennis)}

一昨日(おととい)は会議(かいぎ)が二(ふた)つダブってしまったので、忙(いそが)しかったです。

The day before yesterday, I was busy because two meetings overlapped. {to be duplicated, to be repeated, to overlap, to fall together (of dates, etc.), to coincide, to repeat (a failed course, school year, etc.), to make a double play, to make a double fault (in tennis)}

乱視(らんし)のせいで字(じ)がダブって見(み)えるので、乱視(らんし)用(よう)のコンタクトレンズが必要(ひつよう)です。

Due to astigmatism, text appears to be duplicated, so I need contact lenses for astigmatism. {to be duplicated, to be repeated, to overlap, to fall together (of dates, etc.), to coincide, to repeat (a failed course, school year, etc.), to make a double play, to make a double fault (in tennis)}

聡明(そうめい)にして真面目(まじめ)なあの生徒(せいと)が単位(たんい)を落(お)として一(いち)年(ねん)ダブるなんて何(なに)があったのかな…。

I wonder what happened for that smart and diligent student to fail a course and have to repeat a year... {to be duplicated, to be repeated, to overlap, to fall together (of dates, etc.), to coincide, to repeat (a failed course, school year, etc.), to make a double play, to make a double fault (in tennis)}