Definition of diktat noun from the Oxford Advanced Learner's Dictionary

 

diktat

 noun
noun
BrE BrE//ˈdɪktæt//
 
; NAmE NAmE//dɪkˈtæt//
 
[countable, uncountable](disapproving)
 
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an order given by a government, for example, that people must obey an EU diktat from Brussels government by diktat Word Origin 1930s: from German, from Latin dictatum ‘something dictated’, neuter past participle of dictare.
See the Oxford Advanced American Dictionary entry: diktat