Made up of two matching or complementary elements. / Of twice the quantity. / Of a family relationship, related on both the maternal and paternal sides of a family. / Designed for two users.

Third-person singular simple present indicative form of double

(sports, plural only) a game between pairs of players / (campanology, plural only) bell changes rung on five bells

plural of double

(idiomatic) Rapidly or immediately.

(military) In double time. / (soccer) scoring a brace

The process or an instance of making something double; a multiplication by two. [from 14th c.] / The act of turning around, or doubling back. [from 16th c.] / A pleat or fold. [from 17th c.]

present participle of double

The state of being double or doubled. / Behaviour intended to deceive people.

plural of doubleness