What is the meaning of putter?

noun

• A golfer who is putting.
• The iron normally used on the putting green.
  • synonyms: putting iron

verb

• Work lightly.
  • usage: "The old lady is pottering around in the garden"
  • synonyms: potter
• Do random, unplanned work or activities or spend time idly.
  • usage: "The old lady is usually mucking about in her little house"
  • synonyms: mess around, potter, tinker, monkey, monkey around, muck about, muck around
• Move around aimlessly.
  • synonyms: potter, potter around, putter around