Part of speech: verb

To unfasten a lock; open.

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Usage examples "unlock":

  1. The door leading from the inner office to the corridor is always kept locked on the inside, and I don't suppose I unlock it once in three months. - "Martin Hewitt, Investigator", Arthur Morrison.
  2. If this bright steel unlock not the prison doors of Bertha, mayest thou, my Saviour, shut thine ear against my dying prayers! - "Fiesco or, The Genoese Conspiracy A Tragedy", Frederich Schiller.
  3. My father put his colt into his pocket, and went to unlock the door: my mother, perceiving what he was about, immediately rose and hastened upstairs to her own room. - "Poor Jack", Frederick Marryat.