Definition of "unreasonable"

unreasonable

/ʌnˈɹiːz(ə)nəbl̩/

adjective
comparative more unreasonable, superlative most unreasonable
1. Without the ability to reason; unreasoning.
  Quotations
  Hold thy desperate hand:Art thou a man? thy form cries out thou art:Thy tears are womanish; thy wild acts denoteThe unreasonable fury of a beast:Unseemly woman in a seeming man!
  c. 1591–1595 (date written), William Shakespeare, “The Tragedie of Romeo and Ivliet”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene iii]
2. Not reasonable; going beyond what could be expected or asked for.
  Quotations
  For it seemeth to me vnreasonable, to send a prisoner, and not withall to signifie the crimes laid against him.
  1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Acts 25:27
  The will of those who never allow their will to be disputed, unless they happen to be in a good humour, when they relax proportionally, is almost always unreasonable.
  1791 (date written), Mary Wollstonecraft, chapter 11, in A Vindication of the Rights of Woman: With Strictures on Political and Moral Subjects, 1st American edition, Boston, Mass.: […] Peter Edes for Thomas and Andrews, […], published 1792