Characterized by having two (usually equivalent) components. / Pertaining to two, pertaining to a pair of.

Of an item that is one of a pair, the other item in the pair. / (geometry) Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.

(transitive) To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.

simple past tense and past participle of dual

Alternative form of dualling

plural of dual

(UK) A road in which the two directions of traffic are separated by a central barrier or strip of land, known as a central reservation or median.

(politics) A situation in which a person has been elected to two different bodies with different competencies, for example being a member of both a national legislature, and of a local authority.

Of media, giving the option to listen to audio in two different languages.

(linear algebra) Of a vector space, isomorphic to its dual space. / (mathematics, in projective geometry) Of a proposition that is equivalent to its dual.