English Explanatory Dictionary

dual

English dictionary entry

Meanings

adj
  1. Characterized by having two (usually equivalent) components.
  2. Pertaining to two, pertaining to a pair of.
  3. Pertaining to a grammatical number in certain languages that refers to two of something, such as a pair of shoes.
  4. Exhibiting duality.
  5. Being the space of all linear functionals of (some other space).
  6. Being the dual of some other category; containing the same objects but with source and target reversed for all morphisms.
noun
  1. Of an item that is one of a pair, the other item in the pair.
  2. Of a regular polyhedron with V vertices and F faces, the regular polyhedron having F vertices and V faces.
  3. The dual number.
  4. Of a vector in an inner product space, the linear functional corresponding to taking the inner product with that vector. The set of all duals is a vector space called the dual space.
  5. A head-to-head match or meet between two teams, such as two high schools or colleges.
verb
  1. To convert from single to dual; specifically, to convert a single-carriageway road to a dual carriageway.

Pronunciation

dyo͞oʹəl jo͞oʹəl /ˈd͡ʒuː.əl/ /ˈdjuː.əl/ en-uk-dual.ogg d(y)o͞o'əl /ˈdul/ /ˈd(j)u.əl/

Word forms

dual du. duals dualing dualling dualed dualled

Etymology

PIE word *dwóh₁ Borrowed from Latin dualis (“two”), from duo (“two”) + adjective suffix -alis.

Synonyms

binary double dual twin twofold duplicate duplex duple twissel twosome opposite

Related words

unal duel

Derived words

bidual codual coduality dual audio dual-band dual boot dual-boot dual-braked dual cab dual-capable aircraft dual career couple dual citizen dual citizenship dual-clutch gearbox dual-coding theory dual control dual degree dual earner dual earner couple dual earner family dual economy dual-edged sword dual-energy X-ray absorptiometry dual-exceptional dual federalism dual-frequency dual graph dual heritage dual house dualic dualie dualisation dualism dualist dualistic duality dualization dualize dual-lens reflex dually dual mandate dual meet dual mode dual-mode dual monastery dual nationality dual offence dual phenomenology dual photon absorptiometry dual polyhedron dual-ported dual primary dual-purpose dual resident dual school dual-sector model dual sensory impaired dual-SIM dual SIM dualski

Translations

Arabic: مُثَنًّى Arabic: دَبَل Bulgarian: двоен Catalan: doble Dutch: dubbel- Esperanto: duobla Finnish: kaksi- Finnish: kaksinkertainen French: double Indonesian: ganda Manx: dooblit Polish: podwójny Portuguese: duplo Russian: двойно́й Russian: двоя́кий Russian: сдво́енный Slovene: dvojen Spanish: dual Swedish: dubbel- Swedish: två- Turkish: çift Welsh: deuol Welsh: dwbl
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