block system

from The Collaborative International Dictionary of English v.0.48
System \Sys"tem\, n. [L. systema, Gr. ?, fr. ? to place
   together; sy`n with + ? to place: cf. F. syst[`e]me. See
   {Stand}.]
   1. An assemblage of objects arranged in regular
      subordination, or after some distinct method, usually
      logical or scientific; a complete whole of objects related
      by some common law, principle, or end; a complete
      exhibition of essential principles or facts, arranged in a
      rational dependence or connection; a regular union of
      principles or parts forming one entire thing; as, a system
      of philosophy; a system of government; a system of
      divinity; a system of botany or chemistry; a military
      system; the solar system.
      [1913 Webster]

            The best way to learn any science, is to begin with
            a regular system, or a short and plain scheme of
            that science well drawn up into a narrow compass.
                                                  --I. Watts.
      [1913 Webster]

   2. Hence, the whole scheme of created things regarded as
      forming one complete plan of whole; the universe. "The
      great system of the world." --Boyle.
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   3. Regular method or order; formal arrangement; plan; as, to
      have a system in one's business.
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   4. (Mus.) The collection of staves which form a full score.
      See {Score}, n.
      [1913 Webster]

   5. (Biol.) An assemblage of parts or organs, either in animal
      or plant, essential to the performance of some particular
      function or functions which as a rule are of greater
      complexity than those manifested by a single organ; as,
      the capillary system, the muscular system, the digestive
      system, etc.; hence, the whole body as a functional unity.
      [1913 Webster]

   6. (Zool.) One of the stellate or irregular clusters of
      intimately united zooids which are imbedded in, or
      scattered over, the surface of the common tissue of many
      compound ascidians.
      [1913 Webster]

   {Block system}, {Conservative system}, etc. See under
      {Block}, {Conservative}, etc.
      [1913 Webster] Systematic
    
from The Collaborative International Dictionary of English v.0.48
Block system \Block system\ (Railroads)
   A system by which the track is divided into short sections,
   as of three or four miles, and trains are so run by the
   guidance of electric, or combined electric and pneumatic,
   signals that no train enters a section or block until the
   preceding train has left it, as in

   {absolute blocking}, or that a train may be allowed to follow
      another into a block as long as it proceeds with excessive
      caution, as in

   {permissive blocking}.
      [Webster 1913 Suppl.]
    
from The Collaborative International Dictionary of English v.0.48
Block \Block\ (bl[o^]k), n. [OE. blok; cf. F. bloc (fr. OHG.),
   D. & Dan. blok, Sw. & G. block, OHG. bloch. There is also an
   OHG. bloch, biloh; bi by + the same root as that of E. lock.
   Cf. {Block}, v. t., {Blockade}, and see {Lock}.]
   [1913 Webster]
   1. A piece of wood more or less bulky; a solid mass of wood,
      stone, etc., usually with one or more plane, or
      approximately plane, faces; as, a block on which a butcher
      chops his meat; a block by which to mount a horse;
      children's playing blocks, etc.
      [1913 Webster]

            Now all our neighbors' chimneys smoke,
            And Christmas blocks are burning.     --Wither.
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            All her labor was but as a block
            Left in the quarry.                   --Tennyson.
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   2. The solid piece of wood on which condemned persons lay
      their necks when they are beheaded.
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            Noble heads which have been brought to the block.
                                                  --E. Everett.
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   3. The wooden mold on which hats, bonnets, etc., are shaped.
      Hence: The pattern or shape of a hat.
      [1913 Webster]

            He wears his faith but as the fashion of his hat; it
            ever changes with the next block.     --Shak.
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   4. A large or long building divided into separate houses or
      shops, or a number of houses or shops built in contact
      with each other so as to form one building; a row of
      houses or shops.
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   5. A square, or portion of a city inclosed by streets,
      whether occupied by buildings or not.
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            The new city was laid out in rectangular blocks,
            each block containing thirty building lots. Such an
            average block, comprising 282 houses and covering
            nine acres of ground, exists in Oxford Street.
                                                  --Lond. Quart.
                                                  Rev.
      [1913 Webster]

   6. A grooved pulley or sheave incased in a frame or shell
      which is provided with a hook, eye, or strap, by which it
      may be attached to an object. It is used to change the
      direction of motion, as in raising a heavy object that can
      not be conveniently reached, and also, when two or more
      such sheaves are compounded, to change the rate of motion,
      or to exert increased force; -- used especially in the
      rigging of ships, and in tackles.
      [1913 Webster]

   7. (Falconry) The perch on which a bird of prey is kept.
      [1913 Webster]

   8. Any obstruction, or cause of obstruction; a stop; a
      hindrance; an obstacle; -- also called {blockage}; as, a
      block in the way; a block in an artery; a block in a
      nerve; a block in a biochemical pathway.
      [1913 Webster]

   9. A piece of box or other wood for engravers' work.
      [1913 Webster]

   10. (Print.) A piece of hard wood (as mahogany or cherry) on
       which a stereotype or electrotype plate is mounted to
       make it type high.
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   11. A blockhead; a stupid fellow; a dolt. [Obs.]
       [1913 Webster]

             What a block art thou !              --Shak.
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   12. A section of a railroad where the block system is used.
       See {Block system}, below.
       [1913 Webster]

   13. In Australia, one of the large lots into which public
       land, when opened to settlers, is divided by the
       government surveyors.
       [Webster 1913 Suppl.]

   14. (Cricket)
       (a) The position of a player or bat when guarding the
           wicket.
       (b) A block hole.
       (c) The popping crease. [R.]
           [Webster 1913 Suppl.]

   15. a number of individual items sold as a unit; as, a block
       of airline ticketes; a block of hotel rooms; a block of
       stock.
       [PJC]

   16. the length of one side of a city block[5], traversed
       along any side; as, to walk three blocks ahead and turn
       left at the corner.
       [PJC]

   17. a halt in a mental process, especially one due to stress,
       memory lapse, confusion, etc.; as, a writer's block; to
       have a block in remembering a name.
       [PJC]

   18. (computers) a quantity of binary-encoded information
       transferred, or stored, as a unit to, from, or on a data
       storage device; as, to divide a disk into 512-byte
       blocks.
       [PJC]

   19. (computers) a number of locations in a random-access
       memory allocated to storage of specific data; as, to
       allocate a block of 1024 bytes for the stack.
       [PJC]

   {A block of shares} (Stock Exchange), a large number of
      shares in a stock company, sold in a lump. --Bartlett.

   {Block printing}.
       (a) A mode of printing (common in China and Japan) from
           engraved boards by means of a sheet of paper laid on
           the linked surface and rubbed with a brush. --S. W.
           Williams.
       (b) A method of printing cotton cloth and paper hangings
           with colors, by pressing them upon an engraved
           surface coated with coloring matter.

   {Block system} on railways, a system by which the track is
      divided into sections of three or four miles, and trains
      are so run by the guidance of electric signals that no
      train enters a section or block before the preceding train
      has left it.

   {Back blocks}, Australian pastoral country which is remote
      from the seacoast or from a river.
      [Webster 1913 Suppl.]
    

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