lost motion

noun

, Machinery.

1. motion of a machine or mechanism, especially a reciprocating one, during which no useful work is performed.
2. motion between parts in an assembly due to manufacturing tolerances, adjustments, slip, or wear.

Word History and Origins

Origin of lost motion¹

First recorded in 1875–80

Example Sentences

He found much lost motion and four broken teeth, and he was grease to his eyebrows—in other words, he was happy.

From Project Gutenberg

The makers claim that lost motion can be taken up in a bevel gear much better than in a spur gear.

From Project Gutenberg

Willie's method of eating was in itself a sermon on efficiency—there was no lost motion—no waste of time.

From Project Gutenberg

A slight initial load is applied to take up the lost motion of the machinery, and the beam balanced.

From Project Gutenberg

Noise is an automatic alarm indicating lost motion and wasted energy.

From Project Gutenberg