What does the word rub mean?

Usage examples for rub

  1. We next rub the cover back and forth on its seat, so that the marking on the cover will mark the high spots on the cylinder face. – Modern Machine-Shop Practice, Volumes I and II by Joshua Rose
  2. As soon as you become aware that you have got upon the wrong track, stop and rub out your work until an earlier stage that was right is reached, and start along again from this point. – The Practice and Science Of Drawing by Harold Speed
  3. Ah, that was the rub! – Her Weight in Gold by George Barr McCutcheon
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