dual

American  

[doo-uhl, dyoo-] / ˈdu əl, ˈdyu- /

adjective

1. of, relating to, or noting two.

2. composed or consisting of two people, items, parts, etc., together; twofold; double.

   dual ownership;

   dual controls on a plane.

3. having a twofold, or double, character or nature.

4. Grammar. being or pertaining to a member of the category of number, as in Old English, Old Russian, or Arabic, that denotes two of the things in question.

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noun

Grammar.

1. the dual number.

2. a form in the dual, as Old English git “you two,” as contrasted with ge “you” referring to three or more.

dual British  

/ ˈdjuːəl /

adjective

1. relating to or denoting two

2. twofold; double

3. (in the grammar of Old English, Ancient Greek, and certain other languages) denoting a form of a word indicating that exactly two referents are being referred to

4. maths logic (of structures or expressions) having the property that the interchange of certain pairs of terms, and usually the distribution of negation, yields equivalent structures or expressions

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noun

1. grammar

   1. the dual number

   2. a dual form of a word

verb

1. (tr) to make (a road) into a dual carriageway

Other Word Forms

• dually adverb

Etymology

Origin of dual

First recorded in 1535–45; from Latin duālis “containing two, relating to a pair,” equivalent to du(o) two + -ālis -al ¹

Example Sentences

While I don’t suspect “The Bride!” will be met with this same revisionist praise later in its life, there is something remarkable about the dual “aggravation” of expectations that Gyllenhaal and Shelley’s works share.

From Salon

Annie graduated from Stanford University with dual bachelor's degrees in art and psychology and a master's degree in media studies.

From The Wall Street Journal

The suspects, one Iranian and three dual British-Iranian nationals, were arrested on Friday on suspicion of assisting a foreign intelligence service.

From BBC

Somalia faces dual insurgencies from groups linked to Islamic State and al Qaeda.

From The Wall Street Journal

"This dual metabolic remodeling contributes to improved liver lipid handling and highlights these compounds as promising therapeutic agents for MASLD."

From Science Daily