If there has been an oversight, someone has forgotten to do something which they should have done.
例句
William was angered and embarrassed by his oversight...威廉因為自己的疏忽而羞憤交加。By an unfortunate oversight, full instructions do not come with the product.由于一個不幸的疏忽，產品未能附上完整的說明。
N-UNCOUNT
照管；監督；負責
If someone has oversight of a process or system, they are responsible for making sure that it works efficiently and correctly.
例句
...a new system, where there'll be greater oversight of doctors...加強醫生監管的新體制I had the oversight of their collection of books and manuscripts...我負責照管他們收藏的書籍和手稿。
英漢詞典釋義
n.
疏忽；忽略；失察
Her name was omitted through an oversight.由于疏忽, 她的名字給遺漏了。I consider this a gross oversight on your part.我把這件事看作是你的一大疏忽。
英英詞典釋義
Noun
1. an unintentional omission resulting from failure to notice something
2. management by overseeing the performance or operation of a person or group