Definition of "jackboot"

On a huge tomb-like table in the middle of the room, lay two pencilled profiles of Mr. Fielding, a pawnbroker’s ticket, a pair of ruffles, a very little muff, an immense broadsword, a Wycherley comb, a jackboot, and an old plumed hat; […]

1829, [Edward Bulwer-Lytton], chapter V, in Devereux. A Tale. […], volume II, London: Henry Colburn, […]

There was a wonderful variety of costume to be seen and studied among the persons around me, […] other soldiers in helmets and jackboots; French officers of various uniform; monks and priests; attendants, in old-fashioned and gorgeous livery; […] so that, in any other country, the scene might have been taken for a fancy ball.

1858 February 19 (date written), Nathaniel Hawthorne, “February 19th ”, in Passages from the French and Italian Note-books of Nathaniel Hawthorne, volume I, London: Strahan & Co., […], published 1871, page 98

The coat itself, a long one of some fuzzy material, with huge side pockets into which the man's hands were plunged, reached to the cavernous tops of jackboots where the nether ends of his trousers were stowed away.

1914, Frank L. Packard, The Miracle Man, Chapter 3

The two porters leapt into action, steamed up to the front of the room and started jackbooting the burning paper.

2000, Geoff Nicholson, Bedlam Burning

All his childhood they had stormed through the cinema newsreels, jackbooting triumphantly through Vienna, Prague, Warsaw, Paris. Now they would jackboot through Garmouth. Followed by the Gestapo.

1990, Robert Westall, The Machine Gunners, page 152