1 [chan-l]
the bed of a stream, river, or other waterway.
Nautical. a navigable route between two bodies of water.
the deeper part of a waterway.
a wide strait, as between a continent and an island.
a course into which something may be directed: He hoped to direct the conversation to a new channel.
a route through which anything passes or progresses: channels of trade.
channels, the specific, prescribed, or official course or means of communication: In an emergency he was able to reach the governor without going through channels.
a groove or furrow.
a means of access: He considers the Senate a channel to the White House.
a flute in a column, especially one having no fillet between it and other flutes.
any of the prominent vertical grooves in a triglyph.
(in jazz or popular music) a bridge.
a frequency band of sufficient width for one- or two-way communication from or to a transmitter used for television, radio, CB radio, telephone, or telegraph communication.
Computers. a path for the transfer of signals or data within a computer or between a computer and its peripheral equipment.
Digital Technology.
feed ( def 23 ): Learn how to create your own web channel.
a Web page or website that distributes frequently updated content by means of a feed: Subscribe to my YouTube channel.
either of the two signals in stereophonic or any single signal in multichannel sound recording and reproduction.
Cell Biology. a transient opening made by a protein embedded in a cell membrane, permitting passage of specific ions or molecules into or out of the cell: calcium channel.
a tubular passage for liquids or fluids.
Building Trades.
any structural member, as one of reinforced concrete, having the form of three sides of a rectangle.
a number of such members: channel in 100-foot lengths.
verb (used with object), channeled, channeling or (especially British) channelled, channelling.
to convey through or as through a channel: He channeled the information to us.
to direct toward or into some particular course: to channel one's interests.
to excavate as a channel.
to form a channel in; groove.
verb (used without object), channeled, channeling or (especially British) channelled, channelling.
to become marked by a channel: Soft earth has a tendency to channel during a heavy rain.

1250–1300; Middle English chanel < Old French < Latin canālis waterpipe; see canal

channeler; especially British, channeller, noun
multichanneled, adjective
multichannelled, adjective
nonchanneled, adjective
unchanneled, adjective
unchannelled, adjective

8. trough, gash, cut. 19. route, direct, steer. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
channel1 (ˈtʃænəl)
1.  a broad strait connecting two areas of sea
2.  the bed or course of a river, stream, or canal
3.  a navigable course through a body of water
4.  (often plural) a means or agency of access, communication, etc: to go through official channels
5.  a course into which something can be directed or moved: a new channel of thought
6.  electronics
 a.  a band of radio frequencies assigned for a particular purpose, esp the broadcasting of a television signal
 b.  a path for an electromagnetic signal: a stereo set has two channels
 c.  a thin semiconductor layer between the source and drain of a field-effect transistor, the conductance of which is controlled by the gate voltage
7.  a tubular or trough-shaped passage for fluids
8.  a groove or flute, as in the shaft of a column
9.  computing
 a.  a path along which data can be transmitted between a central processing unit and one or more peripheral devices
 b.  one of the lines along the length of a paper tape on which information can be stored in the form of punched holes
10.  short for channel iron
vb , -nels, -nelling, -nelled, -nels, -neling, -neled
11.  to provide or be provided with a channel or channels; make or cut channels in (something)
12.  (tr) to guide into or convey through a channel or channels: information was channelled through to them
13.  to serve as a medium through whom the spirit of (a person of a former age) allegedly communicates with the living
14.  (tr) to exhibit the traits of (another person) in one’s actions
15.  (tr) to form a groove or flute in (a column, etc)
[C13: from Old French chanel, from Latin canālis pipe, groove, conduit; see canal]

channel2 (ˈtʃænəl)
nautical a flat timber or metal ledge projecting from the hull of a vessel above the chainplates to increase the angle of the shrouds
[C18: variant of earlier chainwale; see chain, wale1 (planking)]

Channel (ˈtʃænəl)
the Channel short for English Channel

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1300, "bed of running water," from O.Fr. chanel, from L. canalis "groove, channel, waterpipe" (see canal) Given a broader, figurative sense and a verbal meaning 1590s. Meaning "circuit for telegraph communication" (1848) probably led to that of "band of frequency for radio or TV signals" (1928).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
channel   (chān'əl)  Pronunciation Key 
  1. A specified frequency band for the transmission and reception of electromagnetic signals, as for television signals.

  2. The part of a field effect transistor, usually U-shaped, through which current flows from the source to the drain. See more at field effect transistor.

  3. A pathway through a protein molecule in a cell membrane that modulates the electrical potential across the membrane by controlling the passage of small inorganic ions into and out of the cell.

  4. The bed or deepest part of a river or harbor.

  5. A large strait, especially one that connects two seas.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Bible Dictionary

Channel definition

(1.) The bed of the sea or of a river (Ps. 18:15; Isa. 8:7). (2.) The "chanelbone" (Job 31:22 marg.), properly "tube" or "shaft," an old term for the collar-bone.

Easton's 1897 Bible Dictionary
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Encyclopedia Britannica


in solid-state physics, the directionally selective penetration of crystalline solids by a beam of atoms. The effect was predicted in 1912 by the German physicist Johannes Stark but was not confirmed until 1960. The directions in which penetration is greatest characteristically are parallel to crystallographic axes, or planes, and the paths followed by the particles are called channels. For example, heavy atoms pass almost unobstructed through suitably oriented aluminum crystals, traversing distances thousands of times those achieved in nonchanneling directions. The phenomenon is useful in studies of crystal structure and in atomic, nuclear, and solid-state physics and holds promise with regard to the fabrication of semiconductors.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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