The difference between Dual and Opposite
When used as nouns, dual means of an item that is one of a pair, the other item in the pair, whereas opposite means something opposite or contrary to something else.
When used as adjectives, dual means exhibiting duality, whereas opposite means located directly across from something else, or from each other.
Dual is also verb with the meaning: to convert from single to dual.
Opposite is also preposition with the meaning: facing, or across from.
Opposite is also adverb with the meaning: in an opposite position.
check bellow for the other definitions of Dual and Opposite
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Dual as an adjective:
Exhibiting duality; characterized by having two (usually equivalent) components.
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Dual as an adjective:
Acting as a counterpart.
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Dual as an adjective:
Double.
Examples:
"[[dual-headed]] computer"
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Dual as an adjective (grammar):
Pertaining to grammatical number (as in singular and plural), referring to two of something, such as a pair of shoes, in the context of the singular, plural and in some languages, trial grammatical number. Modern Arabic displays a dual number, as did Homeric Greek.
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Dual as an adjective (linear algebra):
Being the space of all linear functionals of (some other space).
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Dual as an adjective (category theory):
Being the dual of (some other category); containing the same objects but with source and target reversed for all morphisms.
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Dual as a noun:
Of an item that is one of a pair, the other item in the pair.
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Dual as a noun (geometry):
Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
Examples:
"The octahedron is the dual of the cube."
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Dual as a noun (grammar):
dual number The grammatical number of a noun marking two of something (as in singular, dual, plural), sometimes referring to two of anything (a couple of, exactly two of), or a chirality-marked pair (as in left and right, as with gloves or shoes) or in some languages as a discourse marker, "between you and me". A few languages display trial number.
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Dual as a noun (mathematics):
Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
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Dual as a verb (transitive):
To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.
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Opposite as an adjective:
Located directly across from something else, or from each other.
Examples:
"She saw him walking on the opposite side of the road."
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Opposite as an adjective (botany):
Of leaves and flowers, positioned directly across from each other on a stem.
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Opposite as an adjective:
Facing in the other direction.
Examples:
"They were moving in opposite directions."
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Opposite as an adjective:
Of either of two complementary or mutually exclusive things.
Examples:
"He has a lot of success with the opposite sex."
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Opposite as an adjective:
Extremely different; inconsistent; contrary; repugnant; antagonistic.
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Opposite as a noun:
Something opposite or contrary to something else.
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Opposite as a noun:
An opponent.
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Opposite as a noun:
An antonym.
Examples:
"Up" is the opposite of "down"."
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Opposite as a noun (mathematics):
An additive inverse.
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Opposite as an adverb:
In an opposite position.
Examples:
"I was on my seat and she stood opposite."
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Opposite as a preposition:
Facing, or across from.
Examples:
"He lives opposite the pub."
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Opposite as a preposition:
In a complementary role to.
Examples:
"He played opposite Marilyn Monroe."
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Opposite as a preposition (television):
On another channel at the same time.
Examples:
"The game show ''Just Men!'' aired opposite ''The Young and the Restless'' on CBS."