Definition of "lumberjacket"

As they approached they saw a man running up this track towards the road, a man in lumber jacket and dirty canvas trousers, a rough man, running clumsily up-hill, half foundered.

1952, Neville Shute, chapter 5, in The Far Country‎

He fished into the inside pocket of his lumber jacket and brought out a paper screw of sugar.

1958, Muriel Spark, chapter 4, in Robinson‎, New York: New Directions, published 2003, page 38

[…] swinging back up into the cab of the truck in my Levis and lumberjacket and moccasins (which out on the highway no longer seem the costume that they do in the halls of the high school) […]

1969, Philip Roth, Portnoy’s Complaint‎, New York: Vintage, published 1994, page 170