The act or process of making something true, accurate, or properly aligned, especially the adjustment of a rotating object such as a wheel or grinding stone so that it runs evenly.

Careful truing of the lathe chuck is essential for precision machining.

A single operation or session in which an object is made true or aligned.

After two truings, the wheel finally spun without wobbling.

truinggerund / present participle

Serving to true or used in the process of truing.

He mounted the wheel on a truing stand before beginning the adjustments.

trueverb

To make (something) level, square, or exact; bring into precise alignment.

The mechanic trued the wheel before reinstalling it.