c

C is the third letter of the English alphabet. (letter)

An example of c is the letter with which the word "central" begins.

See c in Webster's New World College Dictionary

or C

noun pl. C's, c's

the third letter of the English alphabet: from the Greek gamma, a borrowing from the Phoenician
any of the speech sounds that this letter represents, as, in English, the (s) of cell or (k) of call
a type or impression of c or C
the third in a sequence or group
an object shaped like

adjective

centi-

the speed of light in a vacuum

noun

a Roman numeral for 100: with a superior bar (), 100,000
☆ Educ. a grade indicating average work: a C in biology
Music
1. the first tone or note in the scale of C major
2. a key, string, etc. producing this tone
3. the scale having this tone as the keynote
4. the sign for 4/4 time
a high-level computer programming language

adjective

average in quality

Also, for 1, 4-6, 9-15, 17-20, 25-27, 29-31, 34, c

carbon

See c in American Heritage Dictionary 4

or C (sē)

noun pl. C's c's or C's also cs or Cs

The third letter of the modern English alphabet.
Any of the speech sounds represented by the letter c.
The third in a series.
Something shaped like the letter C.
C The third best or third highest in quality or rank: a mark of C on a term paper.
Music
a. The first tone in the scale of C major or the third tone in the relative minor scale.
b. A key or scale in which the tone of C is the tonic.
c. A written or printed note representing this tone.
d. A string, key, or pipe tuned to the pitch of this tone.