Definition of peremptory adjective from the Oxford Advanced American Dictionary

 

peremptory

 adjective
adjective
NAmE//pəˈrɛmptəri//
 
(formal)(disapproving)
 
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(especially of someone's manner or behavior) expecting to be obeyed immediately and without question or refusal a peremptory summons The letter was peremptory in tone. with a peremptory wave of his hand
See the Oxford Advanced Learner's Dictionary entry: peremptory