Dual
/ˈdjuː.əl/
Last Updated: January 2, 2026 at 12:30 PM
Scrabble:5 ptsWWF:7 pts4 letters
Definition of Dual
noun
- Of an item that is one of a pair, the other item in the pair.
- Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
"The octahedron is the dual of the cube."
- (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.
- 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.
verb
- To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.
adjective
- Exhibiting duality; characterized by having two (usually equivalent) components.
- Acting as a counterpart.
- Double.
"a dual-headed computer"
- (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."
- Being the space of all linear functionals of (some other space).
Anagrams of Dual
Words You Can Make
4 words can be made from the letters in "dual":
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Synonyms & Antonyms
SYNONYMS
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