a discontinuous line or series of line segments, as a series of dashes, or a figure made up of line segments meeting at oblique angles.
a highway marking consisting of a series of disconnected line segments painted between lanes of a roadway, indicating that crossing from one to the other is permissible.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for broken line
The broken-line systems are new in telephony and for certain fields of work look promising.Cyclopedia of Telephony & Telegraphy Vol. 1|Kempster Miller