Definition of "excuser"

excuser

noun
plural excusers
1. One who offers excuses or pleads in extenuation of the fault of another.
  Quotations
  In vain would his excusers endeavour to palliate his enormities, by imputing them to madness; because it is well known, that madness only operates by inflaming and enlarging the good or evil dispositions of the mind.
  1730, Jonathan Swift, A Vindication of Lord Carteret
2. One who excuses or forgives another.
  Quotations
  yet love is a sufficient excuse and excuser of greater errors than are mine
  1612–1620, [Miguel de Cervantes], Thomas Shelton, transl., The History of the Valorous and Wittie Knight-errant Don-Quixote of the Mancha. […], London: […] William Stansby, for Ed[ward] Blount and W. Barret