What is the meaning of dial?

noun

• The face of a timepiece; graduated to show the hours.
• The control on a radio or television set that is used for tuning.
• The circular graduated indicator on various measuring instruments.
• A disc on a telephone that is rotated a fixed distance for each number called.
  • synonyms: telephone dial

verb

• Operate a dial to select a telephone number.
  • usage: "You must take the receiver off the hook before you dial"
• Choose by means of a dial.
  • usage: "dial a telephone number"