- tap
- 1
noun
1 WATER/GAS (C) a piece of equipment for controlling the flow of water, gas etc from a pipe or container; faucet AmE: turn on the tap (=so that water comes out of it): Carla, don't leave the taps running! | tap water: In some countries, the tap water isn't safe enough to drink. | cold/hot tap (=the tap that cold or hot water comes from)2 BARREL (C) a specially shaped object used for letting liquid out of a barrel 1 (1)3 A LIGHT HIT (C) an act of hitting something lightly, especially to get someone's attention(+ at/on): There was a tap at the door. | Suddenly, I felt a tap on my shoulder and turned round to see Sheila there.4 on tapa) informal something that is on tap is ready to use when you need it: We've got a lot of experts on tap to advise us.b) beer that is on tap comes from a barrel 1 (1)5 DANCING also tap dancing (U) dancing in which you wear special shoes with pieces of metal on the bottom which make a loud sharp sound on the floor6 TELEPHONE (C) an act of secretly listening to someone's telephone, using electronic equipment7 TUNE taps a song or tune played on the bugle at night in an army camp, and at military funerals2 verb tapped, tapping1 HAND OR FOOT (I, T) to hit your hand or foot lightly against something, especially to get someone's attention or without thinking about it: She tapped her feet in time to the music. | tap sth on/against etc: He sat tapping his fingers on the arm of the chair.(+ on): I went up and tapped on the window. | tap sb on the arm/shoulder etc: “Hey Paul,” she said, tapping him on the shoulder. —compare knock 12 ENERGY also tap into (T) to use or take what is needed from an energy supply or power supply: We have enormous reserves of oil still waiting to be tapped.3 IDEAS (T) also tap into to make as much use as possible of the ideas, experience, knowledge etc that a group of people has: Honestly, we have a vast pool of practical experience, just waiting to be tapped.4 TELEPHONE (T) to listen secretly to someone's telephone by using a special piece of electronic equipment5 TREE (T) to get liquid from the trunk of a tree by making a hole in it: tapping rubber trees6 tap sb for sth BrE informal to get money from someone: Joey tapped me for a fiver.tap sth in phrasal verb (T) to put information, numbers etc into a computer, telephone etc by pressing buttons or keys: Tap in your password before you log on.
Longman dictionary of contemporary English. 2004.