tap into

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tap 1

v. tapped, tap·ping, taps
1. To strike gently with a light blow or blows: I tapped you on the shoulder to get your attention.
2. To give a light rap with: tap a pencil.
3. To produce with a succession of light blows: tap out a rhythm.
4. To select, as for membership in an organization; designate. See Synonyms at appoint.
a. To repair (shoe heels or toes) by applying a thin layer of leather or a substitute material.
b. To attach metal plates to (shoe toes or heels).
1. To deliver a gentle, light blow or blows.
2. To walk making light clicks.
3. To tap-dance.
a. A gentle blow.
b. The sound made by such a blow.
a. A thin layer of leather or a substitute applied to a worn-down shoe heel or toe.
b. A metal plate attached to the toe or heel of a shoe, as for tap-dancing.
c. Tap dance.
3. Linguistics See flap.

[Middle English tappen, from Old French taper, of imitative origin.]

tap 2

1. A valve and spout used to regulate delivery of a fluid at the end of a pipe.
2. A plug for a bunghole; a spigot.
a. Liquor drawn from a spigot.
b. Liquor of a particular brew, cask, or quality.
4. Medicine The removal of fluid from a body cavity: a spinal tap.
5. A tool for cutting an internal screw thread.
6. A makeshift terminal in an electric circuit.
7. A wiretap.
tr.v. tapped, tap·ping, taps
1. To furnish with a spigot or tap.
2. To pierce in order to draw off liquid: tap a maple tree.
3. To draw (liquid) from a vessel or container: tap a new keg of beer.
4. Medicine To withdraw fluid from (a body cavity).
5. To make a physical connection with or open outlets from: tap a water main.
a. To wiretap (a telephone or communications channel).
b. To establish an electric connection in (a power line), as to divert current secretly.
7. To establish access to or a connection with: tapped a new market for inexpensive books.
8. To take advantage of; make use of: tapped voter anger to win the election.
9. To cut screw threads in (a collar, socket, or other fitting).
10. Informal To ask (a person) for money.
Phrasal Verb:
tap into
1. To establish a connection with; have access to: tapped into a new market for their products.
2. To take advantage of: tapped into their enthusiasm to improve the school.
on tap
1. Ready to be drawn; in a tapped cask: beer on tap.
2. Available for immediate use; ready: extra personnel on tap.
3. Scheduled or expected: What's on tap for the weekend?

[Middle English tappe, from Old English tæppa, tapered peg used as a stopper; akin to German Zapfen, pine cone, stopper, and perhaps also to Sanskrit stabakaḥ, bouquet, bunch (perhaps originally referring to a bunch of grass that could be used as a stopper ).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

w>tap into

vi +prep obj (= gain access to) system, networkanzapfen; (= exploit) fear, enthusiasmausnutzen
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
References in periodicals archive ?
This helps stop bacteria from travelling through the tap into the tree's xylem vessels, which can cause the tap hole to "plug up" or shut down.
"I want to continue to bring tap into mass media with great respect and quality," she says, focusing on "reprogramming the minds of the general public on their perception of tap dance."
For through holes, the chamfer is ground with a cutting rake that throws the chips ahead of the tap into the core hole.