1. [n]  protective covering that protects something from direct sunlight; "they used umbrellas as shades"; "as the sun moved he readjusted the shade"
2. [n]  a representation of the effect of shade in a picture or drawing (as by shading or darker pigment)
3. [n]  a quality of a given color that differs slightly from a primary color; "after several trials he mixed the shade of pink that she wanted"
4. [n]  a mental representation of some haunting experience; "he looked like he had seen a ghost"; "it aroused specters from his past"
5. [n]  a subtle difference in meaning or opinion or attitude; "without understanding the finer nuances you can't enjoy the humor"; "don't argue about shades of meaning"
6. [n]  a slight amount or degree of difference; "a tad too expensive"; "not a tad of difference"; "the new model is a shade better than the old one"
7. [n]  a position of relative inferiority; "an achievement that puts everything else in the shade"; "his brother's success left him in the shade"
8. [n]  relative darkness caused by light rays being intercepted by an opaque body; "it is much cooler in the shade"; "there's too much shadiness to take good photographs"
9. [v]  protect from light, heat, or view; "Shade your eyes when you step out into the bright sunlight"
10. [v]  represent the effect of shade or shadow on
11. [v]  cast a shadow over

Shade
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1. \Shade\, v. i. [See {Shade}, n.]
   To undergo or exhibit minute difference or variation, as of
   color, meaning, expression, etc.; to pass by slight changes;
   -- used chiefly with a preposition, as into, away, off.
         This small group will be most conveniently treated with
         the emotional division, into which it shades. --Edmund
                                                  Gurney.
   

2. \Shade\ (sh[=a]d), n. [OE. shade, shadewe, schadewe, AS.
   sceadu, scead; akin to OS. skado, D. schaduw, OHG. scato,
   (gen. scatewes), G. schatten, Goth. skadus, Ir. & Gael.
   sgath, and probably to Gr. sko`tos darkness. [root]162. Cf.
   {Shadow}, {Shed} a hat.]
   1. Comparative obscurity owing to interception or
      interruption of the rays of light; partial darkness caused
      by the intervention of something between the space
      contemplated and the source of light.
   Note: Shade differs from shadow as it implies no particular
         form or definite limit; whereas a shadow represents in
         form the object which intercepts the light. When we
         speak of the shade of a tree, we have no reference to
         its form; but when we speak of measuring a pyramid or
         other object by its shadow, we have reference to its
         form and extent.
   2. Darkness; obscurity; -- often in the plural.
            The shades of night were falling fast. --Longfellow.
   3. An obscure place; a spot not exposed to light; hence, a
      secluded retreat.
            Let us seek out some desolate shade, and there Weep
            our sad bosoms empty.                 --Shak.
   4. That which intercepts, or shelters from, light or the
      direct rays of the sun; hence, also, that which protects
      from heat or currents of air; a screen; protection;
      shelter; cover; as, a lamp shade.
            The Lord is thy shade upon thy right hand. --Ps.
                                                  cxxi. 5.
            Sleep under a fresh tree's shade.     --Shak.
            Let the arched knife well sharpened now assail the
            spreading shades of vegetables.       --J. Philips.
   5. Shadow. [Poetic.]
            Envy will merit, as its shade, pursue. --Pope.
   6. The soul after its separation from the body; -- so called
      because the ancients it to be perceptible to the sight,
      though not to the touch; a spirit; a ghost; as, the shades
      of departed heroes.
            Swift as thought the flitting shade Thro' air his
            momentary journey made.               --Dryden.
   7. (Painting, Drawing, etc.) The darker portion of a picture;
      a less illuminated part. See Def. 1, above.
   8. Degree or variation of color, as darker or lighter,
      stronger or paler; as, a delicate shade of pink.
            White, red, yellow, blue, with their several
            degrees, or shades and mixtures, as green only in by
            the eyes.                             --Locke.
   9. A minute difference or variation, as of thought, belief,
      expression, etc.; also, the quality or degree of anything
      which is distinguished from others similar by slight
      differences; as, the shades of meaning in synonyms.
            New shades and combinations of thought. --De
                                                  Quincey.
            Every shade of religious and political opinion has
            its own headquarters.                 --Macaulay.
   {The Shades}, the Nether World; the supposed abode of souls
      after leaving the body.
   

3. \Shade\, v. t. [imp. & p. p. {Shaded}; p. pr. & vb. n.
   {Shading}.]
   1. To shelter or screen by intercepting the rays of light; to
      keep off illumination from. --Milton.
            I went to crop the sylvan scenes, And shade our
            altars with their leafy greens.       --Dryden.
   2. To shelter; to cover from injury; to protect; to screen;
      to hide; as, to shade one's eyes.
            Ere in our own house I do shade my head. --Shak.
   3. To obscure; to dim the brightness of.
            Thou shad'st The full blaze of thy beams. --Milton.
   4. To pain in obscure colors; to darken.
   5. To mark with gradations of light or color.
   6. To present a shadow or image of; to shadow forth; to
      represent. [Obs.]
            [The goddess] in her person cunningly did shade That
            part of Justice which is Equity.      --Spenser.