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

(mathematics) The vector space which comprises the set of linear functionals of a given vector space.

(grammar) A grammatical number denoting a quantity of exactly two.

(grammar) A noun (or specific sense of a noun) that can only occur in the dual, and which lacks forms for singular, plural, and any other number.

plural of dual citizen

A citizen of two countries; a person with dual citizenship.

A form of federalism in which power is clearly divided between the federal and state governments.

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

(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.

plural of dual mandate