oversight

noun

1. an omission or error due to carelessness: My bank statement is full of oversights.
2. unintentional failure to notice or consider; lack of proper attention: Owing to my oversight, the letter was sent unsigned.
3. supervision; watchful care: a person responsible for the oversight of the organization.

noun

1. an omission or mistake, esp one made through failure to notice something
2. supervision

n.“supervision,” early 14c., from over- + sight. Meaning “omission of notice, fact of passing over without seeing” attested from late 15c.; cf. oversee.