Definition of "tumbling"

These so many conquests must needs bring with them many tumblings and tossings, many disturbances and changes in government […]

1677, James Howell, The Pre-eminence and Pedigree of Parlement

Having feasted our souls with this sublime spectacle, we ministered to the wants of the body by a plentiful breakfast, and about noon we commenced the descent, rendered ludicrous enough by various tumblings and sprawlings on the part of the more inexpert mountaineers.

1838, Colburn's New Monthly Magazine and Humorist, page 176

And you have left off tumbling when you waltz now?

1848 November – 1850 December, William Makepeace Thackeray, chapter 46, in The History of Pendennis. […], volumes (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850