Tap. Vocabulary

• tap
• 1

  water/gas

   [countable] especially British Englisha piece of equipment for controlling the flow of water, gas etc from a pipe or container [= faucetAmerican English]
• Tap water (=water that comes out of a tap) is usually heavily treated with chemicals.
• She went into the bathroom and turned on the taps.
• kitchen/bath/garden tap
• I washed my hands under the kitchen tap.
• cold/hot tap (=the tap that cold or hot water comes from)
• 2

  a light hit

   [countable] an act of hitting something lightly, especially to get someone's attention
• tap at/on
• She felt a tap on her shoulder.
• There was a tap at the door.
• 3

   on tap

• a) beer that is on tap comes from a barrel
• b) informal something that is on tap is ready to use when you need it:
• We've got all the information on tap.
• 4

  dancing

  also

   tap dancing

   [uncountable] dancing in which you wear special shoes with pieces of metal on the bottom which make a loud sharp sound on the floor
• 5

  telephone

   [countable] an act of secretly listening to someone's telephone, using electronic equipment:
• The police had put a tap on his phone line.
• 6

  barrel

   [countable] a specially shaped object used for letting liquid out of a barrel, especially beer
• 7

  tune

   taps

   [plural] a song or tune played on the bugle at night in an army camp, and at military funerals

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