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Definition of duality
duality
/duːˈæl.ə.ti/
du · al · i · ty
Adverb:dually
•Plural:dualities
•Adjective:dual
duality Lexical Profile
CEFR
C1
Grade
10
Tier
2
Usage
Top 10k
Syllables
4
duality Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
The quality or condition of being dual, or consisting of two parts, aspects, or natures.
Example
"The novel explores the duality of human nature through its conflicted protagonist."
2
An instance of opposition or contrast between two concepts, forces, or aspects of something.
Example
"Philosophers have long debated the fundamental duality between mind and matter."
3
In mathematics and physics, a symmetrical relationship between two theorems, structures, or physical descriptions that can be mapped onto one another, such as wave-particle duality.
Example
"Quantum mechanics relies heavily on the concept of wave-particle duality to explain the behavior of light."
Synonyms
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View all antonyms for duality• Rhymes for duality
Word Origin & Etymology
Late Middle English, from Late Latin dualitas, from Latin dualis ('dual'), derived from duo ('two').
Cite this Entry
Wordmom. (2026). Definition of Duality. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/duality