What does エラー mean?
エラー is a Japanese noun meaning “error” in English. It can also be translated as “fumble that leads to failing to put out a runner” depending on context. It is written as エラー in hiragana, and eraa in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
彼のエラーがなかったなら我々は勝てたのだが。
If it had not been for his error, we would have won.