verb (v)

• remove from memory or existence(verb.change)

  Example:
  The Turks erased the Armenians in 1915.
  

  Synonym:
  wipe out
  

  source: wordnet30
• remove by or as if by rubbing or erasing(verb.contact)

  Example:
  Please erase the formula on the blackboard--it is wrong!.
  

  Synonym:
  efface, rub out, score out, wipe off
  

  source: wordnet30
• wipe out digitally or magnetically recorded information(verb.communication)

  Example:
  Who erased the files form my hard disk?.
  

  Synonym:
  delete
  Antonym:
  record, tape
  

  source: wordnet30
• To rub or scrape out, as letters or characters written, engraved, or painted; to efface; to expunge; to cross out; as, to erase a word or a name.(verb)

  source: webster1913