1. [n]  a block of wood used to prevent the sliding or rolling of a heavy object
2. [n]  something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them
3. [n]  (golf) an iron with considerable loft and a broad sole
4. [n]  a heel that is an extension of the sole of the shoe
5. [n]  a diacritical mark (an inverted circumflex) placed above certain letters (such as c) to indicate pronunciation
6. [n]  a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
7. [n]  any shape that is triangular in cross section
8. [v]  squeeze like a wedge into a tight space; "I squeezed myself into the corner"
9. [v]  fix, force, or implant; "lodge a bullet in the table"

Wedge
Riebling explores how the notoriously poor relations between the C.I.A. and the F.B.I. may have contributed to some of the greatest crises of the 20th century. His research for this book included access to recently declassified documents and interviews with former agents, from which he draws some startling conclusions.

more details ...

1. \Wedge\, n. [OE. wegge, AS. wecg; akin to D. wig, wigge,
   OHG. wecki, G. weck a (wedge-shaped) loaf, Icel. veggr, Dan.
   v[ae]gge, Sw. vigg, and probably to Lith. vagis a peg. Cf.
   {Wigg}.]
   1. A piece of metal, or other hard material, thick at one
      end, and tapering to a thin edge at the other, used in
      splitting wood, rocks, etc., in raising heavy bodies, and
      the like. It is one of the six elementary machines called
      the mechanical powers. See Illust. of {Mechanical powers},
      under {Mechanical}.
   2. (Geom.) A solid of five sides, having a rectangular base,
      two rectangular or trapezoidal sides meeting in an edge,
      and two triangular ends.
   3. A mass of metal, especially when of a wedgelike form.
      ``Wedges of gold.'' --Shak.
   4. Anything in the form of a wedge, as a body of troops drawn
      up in such a form.
            In warlike muster they appear, In rhombs, and
            wedges, and half-moons, and wings.    --Milton.
   5. The person whose name stands lowest on the list of the
      classical tripos; -- so called after a person (Wedgewood)
      who occupied this position on the first list of 1828.
      [Cant, Cambridge Univ., Eng.] --C. A. Bristed.
   {Fox wedge}. (Mach. & Carpentry) See under {Fox}.
   {Spherical wedge} (Geom.), the portion of a sphere included
      between two planes which intersect in a diameter.
   

2. \Wedge\, v. t. [imp. & p. p. {Wedged}; p. pr. & vb. n.
   {Wedging}.]
   1. To cleave or separate with a wedge or wedges, or as with a
      wedge; to rive. ``My heart, as wedged with a sigh, would
      rive in twain.'' --Shak.
   2. To force or drive as a wedge is driven.
            Among the crowd in the abbey where a finger Could
            not be wedged in more.                --Shak.
            He 's just the sort of man to wedge himself into a
            snug berth.                           --Mrs. J. H.
                                                  Ewing.
   3. To force by crowding and pushing as a wedge does; as, to
      wedge one's way. --Milton.
   4. To press closely; to fix, or make fast, in the manner of a
      wedge that is driven into something.
            Wedged in the rocky shoals, and sticking fast.
                                                  --Dryden.
   5. To fasten with a wedge, or with wedges; as, to wedge a
      scythe on the snath; to wedge a rail or a piece of timber
      in its place.
   6. (Pottery) To cut, as clay, into wedgelike masses, and work
      by dashing together, in order to expel air bubbles, etc.
      --Tomlinson.