The Collaborative International Dictionary of English v.0.48:

Solid \Sol"id\ (s[o^]l"[i^]d), a. [L. solidus, probably akin to
   sollus whole, entire, Gr. ???: cf. F. solide. Cf.
   Consolidate,Soda, Solder, Soldier, Solemn.]
   1. Having the constituent parts so compact, or so firmly
      adhering, as to resist the impression or penetration of
      other bodies; having a fixed form; hard; firm; compact; --
      opposed to fluid and liquid or to plastic, like
      clay, or to incompact, like sand.
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   2. Not hollow; full of matter; as, a solid globe or cone, as
      distinguished from a hollow one; not spongy; dense;
      hence, sometimes, heavy.
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   3. (Arith.) Having all the geometrical dimensions; cubic; as,
      a solid foot contains 1,728 solid inches.
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   Note: In this sense, cubics now generally used.
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   4. Firm; compact; strong; stable; unyielding; as, a solid
      pier; a solid pile; a solid wall.
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   5. Applied to a compound word whose parts are closely united
      and form an unbroken word; -- opposed to hyphened.
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   6. Fig.: Worthy of credit, trust, or esteem; substantial, as
      opposed to frivolous or fallacious; weighty; firm;
      strong; valid; just; genuine.
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            The solid purpose of a sincere and virtuous answer.
                                                  --Milton.
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            These, wanting wit, affect gravity, and go by the
            name of solid men.                    --Dryden.
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            The genius of the Italians wrought by solid toil
            what the myth-making imagination of the Germans had
            projected in a poem.                  --J. A.
                                                  Symonds.
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   7. Sound; not weakly; as, a solid constitution of body. --I.
      Watts.
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   8. (Bot.) Of a fleshy, uniform, undivided substance, as a
      bulb or root; not spongy or hollow within, as a stem.
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   9. (Metaph.) Impenetrable; resisting or excluding any other
      material particle or atom from any given portion of space;
      -- applied to the supposed ultimate particles of matter.
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   10. (Print.) Not having the lines separated by leads; not
       open.
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   11. United; without division; unanimous; as, the delegation
       is solid for a candidate. [Polit. Cant. U.S.]
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   Solid angle. (Geom.) See under Angle.

   Solid color, an even color; one not shaded or variegated.


   Solid green. See Emerald green
       (a), under Green.

   Solid measure (Arith.), a measure for volumes, in which the
      units are each a cube of fixed linear magnitude, as a
      cubic foot, yard, or the like; thus, a foot, in solid
      measure, or a solid foot, contains 1,728 solid inches.

   Solid newel (Arch.), a newel into which the ends of winding
      stairs are built, in distinction from a hollow newel. See
      under Hollow, a.

   Solid problem (Geom.), a problem which can be construed
      geometrically, only by the intersection of a circle and a
      conic section or of two conic sections. --Hutton.

   Solid square (Mil.), a square body or troops in which the
      ranks and files are equal.
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   Syn: Hard; firm; compact; strong; substantial; stable; sound;
        real; valid; true; just; weighty; profound; grave;
        important.

   Usage: Solid, Hard. These words both relate to the
          internal constitution of bodies; but hardnotes a more
          impenetrable nature or a firmer adherence of the
          component parts than solid. Hard is opposed to soft,
          and solid to fluid, liquid, open, or hollow. Wood is
          usually solid; but some kinds of wood are hard, and
          others are soft.
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                Repose you there; while I [return] to this hard
                house,
                More harder than the stones whereof 't is
                raised.                           --Shak.
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                I hear his thundering voice resound,
                And trampling feet than shake the solid ground.
                                                  --Dryden.
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The Collaborative International Dictionary of English v.0.48:

Angle \An"gle\ ([a^][ng]"g'l), n. [F. angle, L. angulus angle,
   corner; akin to uncus hook, Gr. 'agky`los bent, crooked,
   angular, 'a`gkos a bend or hollow, AS. angel hook, fish-hook,
   G. angel, and F. anchor.]
   1. The inclosed space near the point where two lines meet; a
      corner; a nook.
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            Into the utmost angle of the world.   --Spenser.
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            To search the tenderest angles of the heart.
                                                  --Milton.
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   2. (Geom.)
      (a) The figure made by. two lines which meet.
      (b) The difference of direction of two lines. In the lines
          meet, the point of meeting is the vertex of the angle.
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   3. A projecting or sharp corner; an angular fragment.
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            Though but an angle reached him of the stone.
                                                  --Dryden.
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   4. (Astrol.) A name given to four of the twelve astrological
      "houses." [Obs.] --Chaucer.
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   5. [AS. angel.] A fishhook; tackle for catching fish,
      consisting of a line, hook, and bait, with or without a
      rod.
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            Give me mine angle: we 'll to the river there.
                                                  --Shak.
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            A fisher next his trembling angle bears. --Pope.
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   Acute angle, one less than a right angle, or less than
      90[deg].

   Adjacent or Contiguous angles, such as have one leg
      common to both angles.

   Alternate angles. See Alternate.

   Angle bar.
      (a) (Carp.) An upright bar at the angle where two faces of
          a polygonal or bay window meet. --Knight.
      (b) (Mach.) Same as Angle iron.

   Angle bead (Arch.), a bead worked on or fixed to the angle
      of any architectural work, esp. for protecting an angle of
      a wall.

   Angle brace, Angle tie (Carp.), a brace across an
      interior angle of a wooden frame, forming the hypothenuse
      and securing the two side pieces together. --Knight.

   Angle iron (Mach.), a rolled bar or plate of iron having
      one or more angles, used for forming the corners, or
      connecting or sustaining the sides of an iron structure to
      which it is riveted.

   Angle leaf (Arch.), a detail in the form of a leaf, more or
      less conventionalized, used to decorate and sometimes to
      strengthen an angle.

   Angle meter, an instrument for measuring angles, esp. for
      ascertaining the dip of strata.

   Angle shaft (Arch.), an enriched angle bead, often having a
      capital or base, or both.

   Curvilineal angle, one formed by two curved lines.

   External angles, angles formed by the sides of any
      right-lined figure, when the sides are produced or
      lengthened.

   Facial angle. See under Facial.

   Internal angles, those which are within any right-lined
      figure.

   Mixtilineal angle, one formed by a right line with a curved
      line.

   Oblique angle, one acute or obtuse, in opposition to a
      right angle.

   Obtuse angle, one greater than a right angle, or more than
      90[deg].

   Optic angle. See under Optic.

   Rectilineal or Right-lined angle, one formed by two right
      lines.

   Right angle, one formed by a right line falling on another
      perpendicularly, or an angle of 90[deg] (measured by a
      quarter circle).

   Solid angle, the figure formed by the meeting of three or
      more plane angles at one point.

   Spherical angle, one made by the meeting of two arcs of
      great circles, which mutually cut one another on the
      surface of a globe or sphere.

   Visual angle, the angle formed by two rays of light, or two
      straight lines drawn from the extreme points of an object
      to the center of the eye.

   For Angles of commutation, draught, incidence,
   reflection, refraction, position, repose, fraction,
      see Commutation, Draught, Incidence, Reflection,
      Refraction, etc.
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WordNet (r) 3.0 (2006):

solid angle
    n 1: an angle formed by three or more planes intersecting at a
         common point (the vertex)