Definition of "c4" [c4]

  • (abbreviation) 501(c)(4)/501(c)4, an organization that conforms to the United States Internal Revenue Code section 501(c)4 ; a spooky PAC
  • (noun) a type of plastic explosive

Use "c4" in a sentence

  • "The group is a nonprofit 501 c4, which isn't required to disclose its donors."
  • "'c4' if Iain has an aversion to bad language then he'd probably know better than to invite comments on Peter Hain."
  • "Nf1 c4 (13 ... b4 is another way to seek counterplay on the queenside.) 14. axb5 axb5 15."

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