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What are the differences between shade and shadow? Do they have different meanings or can they be used interchangeably?

Let's sit under the shade/shadow.

The cat was afraid of its own shade/shadow.

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7 Answers 7

up vote 8 down vote accepted

A shadow is the silhouette cast by an object that blocks a source of light. You can see your shadow on the ground or a wall or whatever you are blocking from the light source. You can make shadow puppets with your hands. A shadow can be cast by any light source such as a candle, a flashlight, an overhead light, a spotlight, or the sun.

Shade is the "darkness" created by a shadow and only really applies to shadows created outside by the sun. Underneath a tree on a sunny day would be "in the shade". Inside a building would be "out of the sun" and not "in the shade." However, under a roof with no walls (like a picnic shelter) would be "in the shade."

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When used as a verb in the sense of "cast a shadow", shade and shadow can be used interchangeably. The trees shadow/shade the road.

When used as a noun, shade is relative darkness, shadow is what causes the darkness. A tree casts a shadow which causes shade. Shade is shadowiness. A shadow is shade within clear boundaries.

Historically they were the same word. In Old English, nouns were inflected, they had different forms depending on usage. The Old English noun sceadu (shade/shadow) became sceaduwe (in shade/shadow) when preceded by a preposition. Over time, the two word forms became interpreted as different words. The same process happened to the words mead and meadow. The uninflected form became archaic and is now used only poetically. (Mead in the sense of fermented honey has a different origin.)

So depending on context or idiom, they can't usually be used as a noun interchangeably. As well, each word has taken on other shades of meaning which aren't really equivalent. (Couldn't resist.)

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Shade often deals with being sheltered from the sun and does not necessarily have strongly defined edges. A shadow may have more defined edges but aren't necessarily cast from the sun.

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(BrE) Jasper Loy has made me realise that there might be some confusion here, as shade can have two meanings. There's the shade that Eric and ghoppe are talking about, which is sort of indefinite, for example from a group of trees, as opposed to the shadow from a single tree.

I think that is what would normally first come to mind for a native speaker. It's what you look for on a hot day. But here I would usually say sitting in the shade, not under the shade.

And then there's what Jasper is talking about, which we would normally call, I think, a sunshade. This is a bit like a large umbrella or parasol, and which you would indeed sit under.

@ghoppe - Oh, I do like shades of meaning - I've just been listening to 'Round the Horne' on the BBC. Do you know it? That joke would have been perfect for him.

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What you probably want is

Let's sit under the shade

and

The cat was afraid of its own shadow.

A shadow of an object is formed on the ground when the object prevents the sun's rays from reaching the ground. A shade is an object used to shelter you from the sun.

However, shade is also used as an uncountable noun to refer to an area of darkness formed under a cover with the intention of keeping something cool, in which case one would use sit in the shade though sit under the shade is also possible.

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4  
This is not quite complete. Shade is also what shadows are made of. “Let’s sit in the shade.” “101° in the sun, but 80° in the shade.” –  nohat Jan 5 '11 at 7:10
2  
I would probably not describe an umbrella as "a shade". I would say "an umbrella will give us some shade". –  Rosey28 Jan 5 '11 at 8:56
    
a shade (especially one belonging to a person/animal) could be interpreted as a ghost/supernatural thing –  jk. Jan 5 '11 at 11:38

A shadow is a dark shape made by something that blocks the sun or a light
• She saw his shadow on the wall.
A shadow also is an area of darkness made like this
• The side of the valley was in shadow.
A shade is a cool dark area where the sun does not reach, made by the shadow of something such as a tree or wall
• Let's eat our lunch in the shade.
• He sat under the shade of a tree.

source: Longman dictionary

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I can only says that a tree blocking the sun brings about shade and the shade it brings is its shadow, which varies with the sun and time of day.

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