Consisting of or involving two parts or components usually in pairs:
— Dual controls for pilot and copilot.

synonyms: double, duple.

Roget 89: two, twin; dual, dualistic, double; binary, binomial; twin, biparous^†; dyadic [Math.]; conduplicate^†; duplex etc. 90; biduous^†, binate^†, diphyletic^†, dispermic^†, unijugate^†; tete-a-tete.    coupled etc. v.; conjugate.    both, both the one and the other.    ... show more

Polish: dwuczęściowy

Having more than one decidedly dissimilar aspects or qualities:
— A double (or dual) role for an actor.

synonyms: double, three-fold, threefold, treble, two-fold, twofold.

Polish: dychotomiczny, dwoisty, dualistyczny

A grammatical number category referring to two items or units as opposed to one item (singular) or more than two items (plural).

Polish: dualny