Definitions for yarder
(used only in combinations) the height or length of something in yards
"the golfer hit a 300-yarder to the green"
yarder, yard donkey(noun)
a winch (or system of winches) powered by an engine and used to haul logs from a stump to a landing or to a skid road
A motor-driven logging machine which transports logs by means of a system of cables and winches.
Something that is a stated number of yards in some dimension - such as a ten-yarder.