Definition of "peremptory"

there is no reason but if any of the outlawries be indeed without error, but it should be a peremptory plea to the person in a writ of error, as well as in any other action.

1596, Francis Bacon, Maxims of the Law, section II

He marched under a placard reading "End Bossiness Now" but decided it was a little too peremptory, not quite British, so changed the slogan on subsequent badges, to "End Bossiness Soon."

2003, Andrew Marr, The Guardian, 6 Jan 03

Upon the other hand, there are a great many people who, having no private property of their own, and being always on the brink of sheer starvation, are compelled to do the work of beasts of burden, to do work that is quite uncongenial to them, and to which they are forced by the peremptory, unreasonable, degrading Tyranny of want.

1891, Oscar Wilde, The Soul of Man Under Socialism

[…] less surprising than that he had been depressed by a book. Something was making him nibble at the edge of stale ideas as if his sturdy physical egotism no longer nourished his peremptory heart.

1925, F[rancis] Scott Fitzgerald, chapter 1, in The Great Gatsby, New York, N.Y.: Charles Scribner’s Sons, published 1953

Though today (surveying that yellowing document) I shudder at the peremptory tone of the instructions I gave, Alastair - in that same volume in which I get chastised for my coverage of the Macmillan rally - was generous enough to remark that my memorandum became 'an office classic'.

1999 January 2, Anthony Howard, The Guardian, section 99

Each side was allowed 20 peremptories, and the prosecution used 18 of its allotment.

2015 June 18, Justice Alito, Davis v. Ayala, Case No. 13-1428