Peremptory

adj. emphatic, decisive; assertive, aggressive

Peremptory can refer to any of the following concepts in law:A peremptory challengeA peremptory normA peremptory plea
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Adjective
1. offensively self-assured or given to exercising usually unwarranted power; "an autocratic person"; "autocratic behavior"; "a bossy way of ordering others around"; "a rather aggressive and dominating character"; "managed the employees in an aloof magisterial way"; "a swaggering peremptory manner"
(synonym) autocratic, bossy, dominating, high-and-mighty, magisterial
(similar) domineering
2. not allowing contradiction or refusal; "spoke in peremptory tones"; "peremptory commands"
(similar) imperative
3. putting an end to all debate or action; "a peremptory decree"
(similar) decisive

(a.)
Precluding debate or expostulation; not admitting of question or appeal; positive; absolute; decisive; conclusive; final.
  

(a.)
Positive in opinion or judgment; decided; dictatorial; dogmatical.
  

(a.)
Firmly determined; unawed.
  

Final or absolute or not open to challenge. - (read more on Peremptory)