Definition of "jacketless"

He has no time to dress, but snatching his jacket and trowsers in hand flies off. Tom Pipes gives chace, and mercy on the jacketless shoulders if he comes within arm’s length of them.

1828, Sam Spritsail, Chapter 2, in Paisley Magazine, Volume I, No. 6, 2 June, 1828, p. 299

The evening, though sunless, had been warm and muggy for the season, and Tess had come out with her milking-hood only, naked-armed and jacketless; certainly not dressed for a drive.

1891, Thomas Hardy, chapter 29, in Tess of the d’Urbervilles‎

[…] looking in broad daylight exactly as press photos pictured him broadcasting from the NBC studio Sunday nights at nine: jacketless, in his shirtsleeves, with the cuffs rolled up and his tie yanked down and, pushed back from his forehead, the hard-boiled newsman’s fedora.

2004, Philip Roth, chapter 7, in The Plot Against America‎, New York: Vintage, published 2005, page 259