Definitions from Wiktionary ( )

▸ adjective:  Characterized by having two (usually equivalent) components.
▸ adjective:  Pertaining to two, pertaining to a pair of.
▸ adjective:  (grammar) Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes.
▸ adjective:  (mathematics, physics) Exhibiting duality.
▸ adjective:  (linear algebra) Being the space of all linear functionals of (some other space).
▸ adjective:  (category theory) Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms.
▸ noun:  Of an item that is one of a pair, the other item in the pair.
▸ noun:  (geometry) Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
▸ noun:  (grammar) The dual number.
▸ 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.
▸ verb:  (transitive) To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.

---

▸ Word origin

▸ Words similar to dual
▸ Usage examples for dual

▸ Idioms related to dual
▸ Wikipedia articles (New!)
▸ Popular adjectives describing dual
▸ Popular nouns described by dual
▸ Words that often appear near dual
▸ Rhymes of dual

▸ Invented words related to dual