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oversight

American  
[oh-ver-sahyt] / ˈoʊ vərˌsaɪt /

noun

  1. an omission or error due to carelessness.

    My bank statement is full of oversights.

    Synonyms:
    slip, blunder, mistake
  2. unintentional failure to notice or consider; lack of proper attention.

    Owing to my oversight, the letter was sent unsigned.

    Synonyms:
    inattention, neglect, lapse, slip, blunder, mistake
  3. supervision; watchful care.

    a person responsible for the oversight of the organization.

    Synonyms:
    surveillance, control, direction, management

oversight British  
/ ˈəʊvəˌsaɪt /

noun

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

  2. supervision

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of oversight

First recorded in 1300–50; Middle English; over- + sight