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1. a particular quality of alcoholic drink, esp when contained in casks
2. the surgical withdrawal of fluid from a bodily cavity
3. a tool for cutting female screw threads, consisting of a threaded steel cylinder with longitudinal grooves forming cutting edges
4. Electronics chiefly US and Canadian a connection made at some point between the end terminals of an inductor, resistor, or some other component
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(Screw Tap), a tool for cutting a screw thread in a previously drilled hole. A tap is a cylindrical spindle with cutting edges at one end. The other end, or shank, is designed to be fastened in a chuck or held in a tap wrench while being turned.

The main types of taps are manual taps; inside taps, for cutting a complete thread in through holes in one traverse; machine taps, for cutting threads mainly in blind holes on drilling machines, automatic machines, and special assembly-line units; machine-tool taps, for making threads in through holes on nut-tapping machines; grooveless taps, for cutting threads in through holes in one traverse; automatic taps, for cutting threads in nuts on automatic nut-tapping machines; and die and master taps, for cutting threads and thread gauges and removing the burrs in the threaded holes of circular dies. The materials used to make taps are alloy tool steel and high-speed steel.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


(design engineering)
A plug of accurate thread, form, and dimensions on which cutting edges are formed; it is screwed into a hole to cut an internal thread.
A threaded cone-shaped fishing tool.
A connection made at some point other than the ends of a resistor or coil.
A small, threaded hole drilled into a pipe or process vessel; used as connection points for sampling devices, instruments, or controls.
A quantity of molten metal run out from a furnace at one time.
To remove excess slag from the floor of a pot furnace.
(mining engineering)
To intersect with a borehole and withdraw or drain the contained liquid, as water from a water-bearing formation or from underground workings.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


1. A connection to a water supply main.
2. A faucet.
3. A tool used for cutting internal threads, as in a pipe.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.




This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)


(1) In communications, a connecting point on a line. For example, a wire tap is where a recording device is attached to a telephone line. See transceiver and bridged tap.

(2) (Amazon TAP) An Amazon Echo device. See Amazon Echo.

(3) To lightly touch a touch-sensitive screen. See double tap for more details.

(4) To press a key on a keypad.

(6) (TAP) (Telocator Alphanumeric Input Protocol) A protocol for transmitting text to a pager. Developed in the early 1980s, TAP was known as the Motorola Page Entry (PET) and IXO protocols and was adopted by Telocator, which later became the Personal Communications Industry Association (PCIA),

(5) To place a chip-based credit card near a terminal. See NFC and EMV.

The Chip Card Logo
This payment terminal screen shows a credit card being tapped to make a payment via NFC contactless communications.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
"You hear conservatives talk all the time--rightly, in my view -- about the tone set by, well, the Arab world," said Tapper. "The Palestinians and the way they talk about Israelis, justifying -- in the same way, you're doing, no direct link between what the leader says and the violence to some poor Israeli girl in a pizzeria--but the idea you're validating this hatred." We cannot let this slide.
At this, Tapper replied: "I'm sure he's watching and he's happy you said that."
Displaying a level of patience far beyond what is usually expected from a news anchor, Tapper explains, again, that Trump chose to do that because he is Christian.
Moreover, the success of the idle tapper genre right now reinforces that these are exactly the type of games we want to be publishing as we continue to grow our mobile game portfolio."
Was it because we regarded S Tapper Jones as a sort of one-man spy camera permanently scanning his city.
About a year and a half ago, fellow composer Barbara Brilliant called Tapper about making a documentary about that musical dominance.
The Minister also said that his Ministry had launched a very successful programme for training those engaged in the Industry, and in that, action had been taken by the IDB to supply with safety kits and "KASPER" treatment mixture to the tappers, and to set up Kitul centres at Divisional Secretariat level with equipment necessary for manufacture Kitul Products and most importantly insurance of those engaged in Kitul industry, especially the tapper trainers and trainees, added the Minister.
He told the families of Flight Lieutenants Jonathan Tapper and Richard Cook a review found they should not have been blamed for the helicopter crash in the Mull of Kintyre.
Beverley and Peter Bolton and Nikki Tapper Dorrette Smith, Elaine Clough and Imani Clough David Barnett and Keith Redguard Nikki Tapper, Canon Eve Pitts and Rose Menns Doreen Sangster and Celia Russell.
Tapper, author of several Southwest travel books, offers late 19th-century era travel advice about where to go, what to do, and where to stay, in the famous Old West, such as the fancy Tabor Hotel in bustling Leadville, CO.
Research Triangle Park, NC, January 21, 2011 --(PR.com)-- Longistics, a full-service provider of global logistics solutions (http://www.longistics.com), has announced the release of two podcasts with Lou Tapper, Vice President of global business development, discussing the company's recently launched Suzhou Industrial Park International Commodities Exhibition Center and joint partnership with Chinese logistics company SeAll.