adj.
- consisting of two parts, elements, or aspects.
▸Grammar denoting an inflection that refers to exactly two people or things.
-
(often dual to)
Mathematics related to another theorem or expression by the interchange of terms, such as ‘point’ and ‘line’.
n.
- Grammar a dual inflection.
- Mathematics a theorem or expression that is dual to another.
v.
(duals, dualling, dualled)
Brit. convert (a road) into a dual carriageway.
Derivative
- duality n.
(pl. dualities)
. - dualize
or dualise v. - dually adv.
Etymology
ME: from L. dualis, from duo ‘two’.