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.

plural of dual

Alternative form of dualling

simple past tense and past participle of dual

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

(sports) An athletic competition between two teams (of a club, school, nation, etc.), especially track, cross-country, swimming, and rowing.

The status of being a citizen of two countries.