Added 10 October 2026 camshaft /ˈkæmʃæft/ noun Categories: ThingsRare Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about camshaft at Wordnik → Where our words come from → A shaft fitted with cams; especially one in a piston engine that activates the valves. Related Words: crankshaftcambeamshaftarbortreecambeltdriveshaft Back to today's word