A tap is a valve controlling release of liquids or gas.

The above text is a snippet from Wikipedia: Tap (valve)
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  1. A tapering cylindrical pin or peg used to stop the vent in a cask; a spigot.
  2. A device used to dispense liquids.
    We don't have bottled water; you'll have to get it from the tap.
  3. Liquor drawn through a tap; hence, a certain kind or quality of liquor.
    a liquor of the same tap
  4. A place where liquor is drawn for drinking; a taproom; a bar.
  5. A device used to cut an internal screw thread. (External screw threads are cut with a die.)
    We drilled a hole and then cut the threads with the proper tap to match the valve's thread.
  6. A connection made to an electrical or fluid conductor without breaking it.
    The system was barely keeping pressure due to all of the ill-advised taps along its length.
  7. An interception of communication by authority.

Noun (etymology 2)

  1. Device used to listen in secretly on telephone calls.

Noun (etymology 3)

  1. A gentle or slight blow; a light rap; a pat.
    When Steve felt a tap on his shoulder, he turned around.
  2. The act of touching a touch screen.
  3. A piece of leather fastened upon the bottom of a boot or shoe in repairing or renewing the sole or heel; a heeltap.
  4. A signal, by drum or trumpet, for extinguishing all lights in soldiers' quarters and retiring to bed; usually given about a quarter of an hour after tattoo.


  1. To furnish with taps.
  2. To draw off liquid from a vessel.
    He tapped a new barrel of beer.
  3. To place a listening or recording device on a telephone or wired connection.
    They can't tap the phone without a warrant.
  4. To intercept a communication without authority.
    He was known to tap cable television
  5. To cut an internal screw thread.
    Tap an M3 thread all the way through the hole.

Verb (etymology 2)

  1. To strike lightly.
  2. To touch one's finger, foot, or other body parts on a surface (usually) repeatedly.
    He was so nervous he began to tap his fingers on the table.
    She tapped her companion on the back to indicate that she was ready to go.
    Lydia tapped Jim on the shoulder to get his attention.
  3. To make a sharp noise.
    The tree, swaying in the breeze, began to tap on the window pane.
  4. To designate for some duty or for membership, as in 'a tap on the shoulder'.
  5. To have sexual intercourse with.
    I would tap that hot girl over there.
    I'd tap that.
  6. To submit to an opponent by tapping one's hand repeatedly.
  7. To force (an opponent) to submit.
  8. To put a new sole or heel on.
    to tap shoes

The above text is a snippet from Wiktionary: tap
and as such is available under the Creative Commons Attribution/Share-Alike License.

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