c Syllabification: (c)Translate c | into French | into German | into Italian | into Spanish Definition of c abbreviation cent(s). [in combination] (in units of measurement) centi-:centistokes (cS) (circa ) century or centuries:a watch case, 19th c (also circa ) (preceding a date or amount) circa; approximately:Isabella was born c. 1759 (of water) cold:all cabins have h & c colt. symbol Physics the speed of light in a vacuum:E = mc2c in other Oxford dictionaries Definition of c in the British & World English dictionary