dual

/'dju:əl/
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Thân thiện
dual

The actor prepared for his dual role in the play.

Definition
  1. Adjective:
    • Consisting of two parts, elements, or aspects: "dual" describes something that has two components, functions, or natures that are often complementary or contrasting.
    • Relating to or denoting a grammatical number category for two items: In linguistics, "dual" refers to a specific grammatical form (different from singular and plural) used for exactly two of something.
Examples of Usage
  • Adjective:
    • The car has dual exhaust pipes. (This describes a car with two exhaust pipes.)
    • She has the dual role of manager and mentor. (This describes a single person performing two distinct roles.)
    • The aircraft features dual controls for training purposes. (This describes a system with two sets of identical controls.)
Advanced Usage
  • "dual citizenship": the status of being a legal citizen of two countries simultaneously.
    • He holds dual citizenship in Canada and France.
  • "dual nature" or "dual character": having two contrasting aspects or qualities.
    • The story explores the dual nature of humanity, capable of both good and evil.
  • In linguistics: Referring to a grammatical number.
    • Some languages, like Ancient Greek, had a dual number for nouns and verbs.
Variants and Related Words
  • Duality (noun): the quality or state of having two parts or aspects.
    • The duality of light as both a wave and a particle is a key concept in physics.
  • Dualism (noun): a theory or system of thought that recognizes two independent principles, such as mind and body.
    • Cartesian dualism separates the mind from the physical body.
Synonyms
  • Double: consisting of two equal, identical, or similar parts or things.
  • Twofold: having two parts or elements; double.
  • Binary: relating to, composed of, or involving two things.
Related Phrases
  • "serve a dual purpose": to have two functions or uses.
    • This piece of furniture serves a dual purpose as both a seat and a storage unit.
  • "dual carriageway" (British English): a road divided into two separate roadways by a median, typically with two or more lanes in each direction; similar to a divided highway or freeway.
    • Take the A1, it's a dual carriageway most of the way.
Related Idioms
  • "Wear two hats": This idiom is conceptually related to "dual role," meaning to have two different jobs or roles.
    • In our small company, I wear two hats: I'm both the accountant and the HR manager. (This illustrates a dual responsibility.)
dual

The actor prepared for his dual role in the play.

Adjective
  1. a grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural)
    • ancient Greek had the dual form but it has merged with the plural form in modern Greek
  2. having more than one decidedly dissimilar aspects or qualities; public preaching and private influence"- R.W.Emerson
    • a double (or dual) role for an actor
    • the office of a clergyman is twofold
    • every episode has its double and treble meaning-Frederick Harrison
  3. consisting of or involving two parts or components usually in pairs
    • an egg with a double yolk
    • a double (binary) star
    • double doors
    • dual controls for pilot and copilot
    • duple (or double) time consists of two (or a multiple of two) beats to a measure

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