C

C

c [si:] n plural C's c's [U and C]

1.) the third letter of the English alphabet

2.) the first note in the musical ↑scale of C ↑major, or the musical ↑key based on this note

3.) a mark given to a student's work to show that it is of average quality

4.) the number 100 in the system of ↑roman numerals

C ²

C

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!