TaP

Tap is a word with several related meanings in everyday language. As a verb, to tap means to strike something lightly or to draw liquid from a container via a valve. As a noun, it can refer to the valve itself, a device used to control the flow of liquid, or the act of accessing a resource.

In plumbing, a tap (faucet in American English) is a valve that controls the release of water from a supply line. Most taps have a handle or knob to regulate flow and temperature. They connect to pipes and may include aerators, cartridge units, or thermostatic mixers.

In beverage service, a beer tap is a dispensing device attached to a keg or cask that releases beer or other drinks. The tap handle opens a valve and allows gas pressure to push the liquid through a spout into a glass.

Other uses include tapping a tree to collect sap, famously maple sap for syrup. The process involves drilling a hole and inserting a spout to harvest liquid, which must be managed to minimize harm to the tree.

In metalworking, tapping is the process of cutting internal screw threads in a hole, using a tap. The term also applies to devices used for threading, such as threading machines and tap wrenches.

Tap dance is a form of rhythmic movement in which the sounds are produced by metal taps on the dancer's shoes striking the floor. In computing and mobile devices, a tap refers to a quick touch on a touchscreen or trackpad, registering as a selection; "tap tempo" describes setting a beat by tapping a button repeatedly.