What does the word dozen mean?

Usage examples for dozen

  1. If any of you come within a dozen yards of us I shall fire." – A Hero of Liége by Herbert Strang
  2. It is six for Cartoner and half a dozen for myself. – The Vultures by Henry Seton Merriman
  3. There are probably half a dozen calls waiting at the office. – Red Pepper Burns by Grace S. Richmond
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