English

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

 

unannounced

 adjective
adjective
BrE BrE//ˌʌnəˈnaʊnst//
 
; NAmE NAmE//ˌʌnəˈnaʊnst//
 
 
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happening without anyone being told or warned in advance She just turned up unannounced on my doorstep. an unannounced increase in bus fares
See the Oxford Advanced American Dictionary entry: unannounced