consisting of two parts, elements, or aspects

their dual role at work and home

dual-language texts in English and Italian

(of a theorem, expression, etc.) related to another by the interchange of particular pairs of terms, such as ‘point’ and ‘line’

a dual form of a word

a theorem, expression, etc., that is dual to another

convert (a road) into a dual carriageway

though there are no plans to dual the road, a public consultation on the A64 is set to start before the end of the year