adj. 25B6; adjective
a peremptory reply : BRUSQUE, imperious, high-handed, brisk, abrupt, summary, commanding, dictatorial, autocratic, overbearing, dogmatic, arrogant, overweening, lordly, magisterial, authoritarian; emphatic, firm, insistent; informal bossy.
a peremptory order of the court : IRREVERSIBLE, binding, absolute, final, conclusive, decisive, definitive, categorical, irrefutable, incontrovertible; Law unappealable.