cam Syllabification: (cam)Pronunciation: /kam/Translate cam | into Italian Definition of cam noun a projection on a rotating part in machinery, designed to make sliding contact with another part while rotating and to impart reciprocal or variable motion to it. short for camshaft. short for camera1.Origin: late 18th century: from Dutch kam 'comb', as in kamrad 'cogwheel'cam in other Oxford dictionaries Definition of cam in the British & World English dictionary