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

  

unanticipated

 adjective
adjective
BrE BrE//ˌʌnænˈtɪsɪpeɪtɪd//
 
; NAmE NAmE//ˌʌnænˈtɪsɪpeɪtɪd//
 
(formal)
 
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that you have not expected or predicted; that you have not anticipated unanticipated costsExtra examples If there is unanticipated inflation, real wages fall. There was no spare cash and they dreaded the unanticipated bill or unforeseen expenditure. Unanticipated monetary growth generally has a positive effect on real output.
See the Oxford Advanced American Dictionary entry: unanticipated