What does the word leverage mean?

Usage examples for leverage

  1. Marishka took the candle from his hand again while he examined the fastenings- nails somewhat rusted, which would not resist leverage. – The Secret Witness by George Gibbs
  2. Anger and apprehensiveness were working twin leverage on the Comas executive. – Joan of Arc of the North Woods by Holman Day
  3. I said you didn't have the right leverage. – Tom Swift and his Motor-cycle by Victor Appleton