tap /ˈtæp/
  輕打,水龍頭(vt.)輕打,輕敲,敲打出,選擇,裝上嘴子,使流出,開發,召集,分接
  tap
  接點
  tap
  分接頭
  Tap v. t. [imp. & p. p. Tapped p. pr. & vb. n. Tapping.]
  1. To strike with a slight or gentle blow; to touch gently; to rap lightly; to pat; as, to tap one with the hand or a cane.
  2. To put a new sole or heel on; as, to tap shoes.
  Tap, n.
  1. A gentle or slight blow; a light rap; a pat.
  2. A piece of leather fastened upon the bottom of a boot or shoe in repairing or renewing the sole or heel.
  3. pl. Mil. 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.
  Tap, n.
  1. A hole or pipe through which liquor is drawn.
  2. A plug or spile for stopping a hole pierced in a cask, or the like; a faucet.
  3. Liquor drawn through a tap; hence, a certain kind or quality of liquor; as, a liquor of the same tap. [Colloq.]
  4. A place where liquor is drawn for drinking; a taproom; a bar. [Colloq.]
  5. Mech. A tool for forming an internal screw, as in a nut, consisting of a hardened steel male screw grooved longitudinally so as to have cutting edges.
  On tap. (a) Ready to be drawn; as, ale on tap. (b) Broached, or furnished with a tap; as, a barrel on tap.
  Plug tap Mech., a screw-cutting tap with a slightly tapering end.
  Tap bolt, a bolt with a head on one end and a thread on the other end, to be screwed into some fixed part, instead of passing through the part and receiving a nut. See Illust. under Bolt.
  Tap cinder Metal., the slag of a puddling furnace.
  Tap, v. i. To strike a gentle blow.
  Tap, v. t.
  1. To pierce so as to let out, or draw off, a fluid; as, to tap a cask, a tree, a tumor,  a keg of beer, etc.
  2. Hence, to draw resources from (a reservoir) in any analogous way; as, to tap someone's knowledge of the Unix system; to tap the treasury.
  3. To draw, or cause to flow, by piercing.
     He has been tapping his liquors.   --Addison.
  4. Mech. To form an internal screw in (anything) by means of a tool called a tap; as, to tap a nut, a pipe, or tubing.
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  tap
       n 1: the sound made by a gentle blow [syn: pat, rap]
       2: a faucet for drawing water from a pipe or cask [syn: water
          faucet, water tap, spigot, hydrant]
       3: a gentle blow [syn: rap, strike]
       4: a small metal plate that attaches to the toe or heel of a
          shoe (as in tap dancing)
       5: a tool for cutting female (internal) screw threads
       6: a plug for a bunghole in a cask [syn: spigot]
       7: the act of tapping a telephone or telegraph line to get
          information [syn: wiretap]
       8: a light touch or stroke [syn: pat, dab]
       v 1: cut a female screw thread with a tap
       2: draw from or dip into to get something; "tap one's memory";
          "tap a source of money"
       3: strike lightly; "He tapped me on the shoulder" [syn: tip]
       4: draw from; make good use of; "we must exploit the resources
          we are given wisely" [syn: exploit]
       5: tap a telephone or telegraph wire to get information; "The
          FBI was tapping the phone line of the suspected spy"; "Is
          this hotel room bugged?" [syn: wiretap, intercept, bug]
       6: furnish with a tap or spout, so as to be able to draw liquid
          from it; "tap a cask of wine"
       7: make light, repeated taps on a surface; "he was tapping his
          fingers on the table impatiently" [syn: rap, knock, pink]
       8: walk with a tapping sound
       9: dance and make rhythmic clicking sounds by means of metal
          plates nailed to the sole of the dance shoes; "Glover
          tapdances better than anybody" [syn: tapdance]
       10: draw (liquor) from a tap; "tap beer in a bar"
       11: pierce in order to draw a liquid from; "tap a maple tree for
           its syrup"; "tap a keg of beer"
       12: make a solicitation or entreaty for something; request
           urgently or persistently; "Henry IV solicited the Pope
           for a divorce"; "My neighbor keeps soliciting money for
           different charities" [syn: solicit, beg]
       [also: tapping, tapped]