Home › Words › T › truingtruingtruing · noun — the alignment (and cutting) of a wheel (especially a grinding wheel) such that its surface is concentric with its axis.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, truing ranks #6,562 of 42,834 for Qualifying.EtymologyFrom true + -ing.nounThe alignment (and cutting) of a wheel (especially a grinding wheel) such that its surface is concentric with its axis.e.g.“The wheel slides are purposely slightly under-compensated, causing the work to approach an oversize condition after several truings.” — 1956, Grits and Grinds, Norton Company, page 41:Definitions & examples from Wiktionary (CC BY-SA 3.0).