From King Dictionary of Contemporary English unreasonable un‧rea‧son‧a‧ble / ʌnˈriːz ənəb əl / ●●○ adjective 1 UNFAIR not fair or sensible I think he’s being unreasonable. Don’t let your boss make unreasonable demands on you. it is unreasonable to do something It’s unreasonable to expect you to work seven days a week. It’s not unreasonable to ask him to help you. 2 EXPENSIVE unreasonable prices, costs etc are too high — unreasonably adverb unreasonably high prices Examples from the Corpus unreasonable • Now he's just being unreasonable. • Some news media have described the government's actions as excessive and unreasonable. • Nevertheless, to require that all educating be done in public schools was considered arbitrary and unreasonable. • Now it is not possible to give a confident answer to the question whether the delay was unreasonable. • I don't think the amount of homework they get is unreasonable. • I think your attitude is most unreasonable. • She knew she was being unreasonable, and she was worried she might alienate David. • She divorced her husband on the grounds of unreasonable behaviour. • Even the most caring parents will sometimes make unreasonable demands on their children. • unreasonable expectations • It is not unreasonable for parents to want schools to reinforce the values children are taught at home. • It is possible for telephone companies to make profit without charging unreasonable rates. • I don't know why you have such an unreasonable reaction to it. • Within limits this seems a not unreasonable request. • It didn't seem like an unreasonable request. • The trial court found that her demands were not petty or unreasonable, since they involved practices she felt were racially discriminatory. • Don't you think it's a little unreasonable to charge someone $75 just for parking their car? • It's unreasonable to expect people to pay for something they haven't even seen yet. • It is unreasonable to expect them to anticipate what additional rights they ought to have. it is unreasonable to do something • In survey conditions it is unreasonable to ask for a ranking of more than ten objects.