verb (used with object), red·lined, red·lin·ing.
verb (used without object), red·lined, red·lin·ing.
- the maximum rotational speed, or angular velocity, of the engine crankshaft that is considered safe: often measured in rpm.
- a red line or boundary of a red area that delineates such a value, as on a tachometer.
Origin of redline
Examples from the Web for red-lined
Historical Examples of red-lined
Barbara and Reynold were apart from all the rest in the square, red-lined pew which had always belonged to the Rothwells.Mitchelhurst Place, Vol. I (of 2)
He was about to fire, when one of the Indians in the hole below spotted the red-lined coat.An Autobiography of Buffalo Bill (Colonel W. F. Cody)
Buffalo Bill (William Frederick Cody)
Now and then a pale nurse, dressed in white, with white helmet and red-lined parasol would walk through the throng.In Mesopotamia
Mr. Dunbar took his faithful friend—his short pipe—from its red-lined case, filled it with tobacco, and began to draw luxuriously.Peter and Jane
S. (Sarah) Macnaughtan
He lay in uniform, upon the red-lined cloak, his plumed hat beside him, his sword in his hand.The Long Roll
also red-line, "mark in red ink," 1820, from red (adj.1) + line (v.). Specific sense of "deny loans to certain neighborhoods based on ethnicity" is from 1973, on notion of lines drawn on maps. Used earlier in reference to insurance company practices (1961) and in World War II military slang in reference to a red line drawn through a soldier's name for some infraction, thus denying his pay. Related: Redlined; redlining.