What is the meaning of pencil?

noun

• A thin cylindrical pointed writing implement; a rod of marking substance encased in wood.
• Graphite (or a similar substance) used in such a way as to be a medium of communication.
  • usage: "the words were scribbled in pencil"; "this artist's favorite medium is pencil"
• A figure formed by a set of straight lines or light rays meeting at a point.
• A cosmetic in a long thin stick; designed to be applied to a particular part of the face.
  • usage: "an eyebrow pencil"

verb

• Write, draw, or trace with a pencil.
  • usage: "he penciled a figure"