Webster's Revised Unabridged Dictionary · 1913

Shade

Shade (shād) , noun

[Old English shade, shadewe, schadewe, Anglo-Saxon sceadu, scead; akin to Old Saxon skado, Dutch schaduw, Old High German scato, (gen. scatewes), German schatten, Gothic skadus, Ir. & Gael. sgath, and probably to Greek sko`tos darkness. r162. Compare 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.

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. — Shakespeare
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. — Bible (KJV) - Psalm cxxi. 5
Sleep under a fresh tree's shade. — Shakespeare
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
Collocations (1)
The Shades , the Nether World; the supposed abode of souls after leaving the body.

Shade , transitive verb

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. — Shakespeare
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. [Obsolete]
[The goddess] in her person cunningly did shade That part of Justice which is Equity. — Spenser

Shade (shād) , intransitive verb

[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