dual
/ˈdjuːəl
/adjective
1 [attributive] Consisting of two parts, elements, or aspects: their dual role at work and home dual-language texts in English and Italian...
- Inexperienced nurses usually remain in orientation for an average of five months - longer if they are expected to function in a dual role.
- From the beginning his relationship with her has got this dual element to it.
- These critics also recognize the dual aspects of decolonization.
Synonyms
double, twofold, binary;
duplicate, duplex, twin, matched, matching, paired, in pairs, coupled
rare binate
1.1 Grammar (In some languages) denoting an inflection that refers to exactly two people or things (as distinct from singular and plural).Yimas proper distinguishes four numbers in its pronominal paradigm (singular, dual, paucal, and plural) while Yimas Pidgin has only three....
- It has dual number, so nouns and verbs must be learned in singular, dual, and plural.
- Languages with dual markers have a different plural affix for sets of two than the affix for sets greater than two.
1.2(In an aircraft) using dual controls: a dual flight...
- You might want to consider scheduling an annual dual flight with an experienced instructor to review downwind take-offs and landings.
- Schedule periodic dual flights when the crosswind exceeds your comfort level.
- It would show the reaction of non flyers being taken on dual flights in incredible scenery.
2 (often dual to) Mathematics (Of a theorem, expression, etc.) related to another by the interchange of particular pairs of terms, such as ‘point’ and ‘line’.He had proved that compact abelian groups are dual to discrete abelian groups, and von Neumann was interested in extending this result.
noun
1 Grammar A dual form of a word.
1.1 [mass noun] The dual number.
2 Mathematics A theorem, expression, etc., that is dual to another.In fact this theorem is simply the dual of Pascal's theorem which was proved in 1639....
- Because of the demands of differentiability in distribution theory, the spaces of test-functions and their duals are somewhat more complicated.
verb (duals, dualling, dualled) [with object] British
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...
- The answer is to double the capacity of the single carriageway, so the outer ring road is dualled all the way around.
- But the major issue on the lips of many motorists, that of dualling the road, is not being addressed by Highways Agency chiefs.
- Firstly, that it will have an effect on the Rillington bypass if the road is fully dualled and that will be a further setback for the people of Rillington.
Derivatives
dualize
- As a result, we have dualized spirituality and sexuality.
- What gives the track the edge are the dualised male/female vocals.
dually
- ‘The smart chip is dually engineered to prematurely register ink depletion and to render a cartridge unusable through the use of a built-in expiration date that is not revealed to the consumer,’ the suit said.
- And the men in Almodóvar's films are dually endowed with ‘feminine’ and ‘masculine’ characteristics.
- Specialized 12-step groups for persons dually diagnosed with substance abuse and mental health disorders also appear to be useful in encouraging abstinence and adherence to psychiatric medication.
Origin
Late Middle English (as a noun denoting either of the two middle incisor teeth in each jaw): from Latin dualis, from duo 'two'.