pad

• pad [countable]
• 1

  soft material

  a thick flat object made of cloth or rubber, used to protect or clean something, or to make something more comfortable
• pad of
• Press on the wound with a large pad of cotton wool.
• Use an abrasive pad for stubborn stains.
• knee/elbow/shin/shoulder pad (=a pad that you wear to protect a part of your body when you are playing a sport)
• 2

  paper

  several sheets of paper fastened together, used for writing or drawing
• writing/sketch/memo/legal etc pad
• a box of paints and a sketch pad
• Keep a telephone pad and a pen to hand.
• a pad of paper
• 3

  flat ground

  a piece of flat ground where small aircraft can land
• launch/landing/helicopter pad
• The hospital has built a helicopter pad.
• 4

  animal's foot

  the flesh on the bottom of the foot of a cat, dog, etc
• 5

  apartment

  old-fashioned informal someone's apartment or the room where they live
• 6

  water plant

  the leaf of a water lily
• ➔ launch pad, helicopter pad

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.