Dictionary.com
definitions

dragline

[drag-lahyn]
noun
  1. a rope dragging from something; dragrope.
  2. dragline crane.

Origin of dragline

An Americanism dating back to 1915–20; drag + line1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for dragline

dragline

noun
  1. another word for dragrope (def. 2)
  2. Also called: dragline crane, dragline excavator a power shovel that operates by being dragged by cables at the end of an arm or jib: used for quarrying, opencast mining, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012