What is the meaning of pat?

noun

• The sound made by a gentle blow.
  • synonyms: rap, tap
• A light touch or stroke.
  • synonyms: tap, dab

verb

• Pat or squeeze fondly or playfully, especially under the chin.
  • synonyms: chuck
• Hit lightly.
  • usage: "pat him on the shoulder"
  • synonyms: dab

adjective

• Having only superficial plausibility.
  • usage: "glib promises"; "a slick commercial"
  • synonyms: glib, slick
• Exactly suited to the occasion.
  • usage: "a pat reply"

adverb

• Completely or perfectly.
  • usage: "he has the lesson pat"; "had the system down pat"