From Longman Dictionary of Contemporary EnglishCC1, c /siː/ noun (plural C’s, c’s) [countable, uncountable] 1 SLAthe third letter of the English alphabet2 APMthe first note in the musical scale of C major, or the musical key based on this note3 RESULT/GRADEa mark given to a student’s work to show that it is of average quality4 HMthe number 100 in the system of roman numerals
Examples from the Corpus
C• Terry got a C in algebra.CC2 1 the written abbreviation of Celsius or Centigrade Water boils at 100°C.2 written informal a way of writing ‘see’, used especially in emails and text messages CU (=see you) in class!cc (also c.) 1 (also C) the written abbreviation of century the economic changes of the C20th2 APPROXIMATELYa written abbreviation of circa (=about), used especially before dates c. 18303 → ©4 American English the written abbreviation of cup, used in cooking©©the written abbreviation of copyright → cFrom Longman Business Dictionarycc written abbreviation for CENTIME 