• (letter name) IPA: /siː/ (usually spelled cee)
• (phoneme) IPA: /k/, /s/, /tʃ/, ...

1. Letter of the English alphabet

1. Alternative form of c.

c

1. (music) The middle tone in either one of the sets of seven white keys on a keyboard or a set of seven strings on a stringed instrument.

1. (Internet slang, text messaging) Abbreviation of see#English|see; also C.

• (letter name) IPA: /siː/
• (phoneme) IPA: /s/, /k/, /tʃ/, /ks/, /ʃ/, ...

1. Letter of the English alphabet
   • 1945 August 17, George Orwell [pseudonym; Eric Arthur Blair], chapter 3, in Animal Farm: A Fairy Story, London: Secker & Warburg, OCLC 3655473 ↗:

     Boxer could not get beyond the letter D. He would trace out A, B, C, D, in the dust with his great hoof […]

c (plural cs)

1. (slang) $100; a c-note.
2. (music) The first note in the C chromatic and major scales.
3. An academic grade better than a D and worse than a B.
4. (Unicode) canonical decomposition, followed by Canonical composition
5. (slang) Cocaine.
   • 1945, William Burroughs, letter, 24 Jul 1945:

     Where did you secure the C? My own supply is utterly depleted.

6. Abbreviation of consonant#English|consonant.
7. (UK, politics, in election results) Conservative

• (in Unicode) D, KC, KD, NF

1. (programming) A particular high-level programming language from which many others are derived.
   • 1995, Gary Wolf, "The Curse of Xanadu", Wired Magazine ↗

     The PDP-11, from the Digital Equipment Corporation, was a coveted machine. It was the original computer to run a new programming language called C, which was on its way to becoming the hackers' standard. Gregory, as it happened, didn't have any spare PDP-11s at his disposal. But the repairman took the opportunity to question some of Nelson's blithe predictions in Computer Lib, and Nelson, in response, unleashed his glib and bitter tirade against the conservative ignoramuses in the computer business.

2. (British) Head of the Secret Intelligence Service.
3. (stock symbol) Symbol for the company Citigroup Inc on the NYSE

• C major, C minor
• C sharp, C sharp, C♯
• BCPL

• French: C, langage C

• French: do, ut
• Italian: do
• Russian: до

1. (Internet slang, text messaging) Abbreviation of see#English|see; also c.