What does the word ounce mean?

Usage examples for ounce

  1. I'll help you with every ounce of strength in my mind and body, my dear. – Black Jack by Max Brand
  2. Nicol, his dark eyes blazing with a merciless fury, was flinging every ounce of his strength into each blow of the terrible weapon in his hand. – The Heart of Unaga by Ridgwell Cullum