Definition of unrealistic adjective from the Oxford Advanced Learner's Dictionary

 

unrealistic

 adjective
adjective
BrE BrE//ˌʌnrɪəˈlɪstɪk//
 
; NAmE NAmE//ˌʌnriːəˈlɪstɪk//
 
 
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not showing or accepting things as they are unrealistic expectations It is unrealistic to expect them to be able to solve the problem immediately. They were accused of being unrealistic in their demands. opposite realistic
See the Oxford Advanced American Dictionary entry: unrealistic