(redirected from tapper)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Wikipedia.


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



(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.


(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.


1. A connection to a water supply main.
2. A faucet.
3. A tool used for cutting internal threads, as in a pipe.






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

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

(3) To press a key on a keypad.

(4) (Amazon TAP) See Amazon Echo.

(5) (TAP) (Telocator Alphanumeric Protocol) A paging protocol used to transmit up to a thousand 7-bit characters to an alphanumeric pager. Developed in the early 1980s by the Telocator Paging Association, which later became the Personal Communications Industry Association (PCIA), TAP was also known as IXO and PET. TAP is widely used in the U.S. and throughout Europe.
References in periodicals archive ?
Tapper, the son of a Polish father and a Lithuanian mother, found substantive roots for this centrality in Eastern European music.
The Defence Secretary said: "We were told that Flt Lt Tapper telephoned his deputy flight commander on the evening before the delivery of ZD 576 to Northern Ireland expressing concern that some time had passed since his conversion training.
If Dugger does sell Club 420 and purchase Tom's Tapper Tavern, he will still have to deal with Springfield city government.
Tapper joined the NFU in September 2002 and, prior to taking on the food and farming role, was head of marketing.
Visually, the Letter Tapper was an unsurpassable work of art in itself.
Maybe another reporter will come along and dig deeper on this and the other suspicious Election Day activities to which Tapper devotes only a chapter.
Altanta left wing Hnat Domenichelli and right wings Brad Tapper and Jeff Odgers all scored goals during a span that covered 6:45 of the middle of the first period.
Flight lieutenants Jonathan Tapper, 28, and Richard Cook, 30, died along with senior Army officers, Northern Ireland officials elite members of the RUC and MI5.
According to Jake Tapper in the July 13 Salon, many of the cities suing gun makers are themselves major distributors of guns, police surplus and otherwise, to the used market.
In section one, Tapper debunks the standard story of the mythical origin of the Shahsevan as a tribal force created by Shah [CHARACTERS NOT REPRODUCIBLE IN ASCII]Abbas I to assist him in putting down the rebellious Qezelbash and provide general support for his dynasty.