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⇱ twin - WordReference.com Dictionary of English

twin

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UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈtwɪn/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/twɪn/ ,USA pronunciation: respelling(twin)

Inflections of 'twin' (v): (⇒ conjugate)
twins
v 3rd person singular
twinning
v pres p
twinned
v past
twinned
v past p

WordReference Random House Learner's Dictionary of American English © 2026
twin1 /twɪn/USA pronunciation   n. [countable]
  1. Developmental Biologyeither of two offspring born at one birth:fraternal twins or identical twins.
  2. either of two persons or things closely resembling each other.

adj. [before a noun]
  1. being a twin or twins:twin sisters.
  2. being two persons or things closely related to each other.
  3. being one of a pair;
    identical: twin towers.
  4. made of two similar parts connected:a twin vase.

WordReference Random House Unabridged Dictionary of American English © 2026
twin1 (twin),USA pronunciation 
n. 
  1. Developmental Biologyeither of two children or animals brought forth at a birth.
  2. either of two persons or things closely related to or closely resembling each other.
  3. FurnitureSee twin bed. 
  4. Also called twin room. a type of hotel accommodation with twin beds, for occupancy by two persons. Cf. double (def. 13).
  5. CrystallographyAlso called hemitrope. a compound crystal consisting of two or more parts or crystals definitely oriented each to the other;
    macle.
  6. Astronomy, Astrology Twins, the constellation or sign of Gemini.

adj. 
  1. being a twin or twins:twin sisters.
  2. being two persons or things closely related to or closely resembling each other.
  3. being one of a pair;
    identical:a twin bracelet; a twin peak.
  4. consisting of two similar parts or elements joined or connected:a twin vase.
  5. Botany, Zoologyoccurring in pairs;
    didymous.
  6. Crystallographyof the nature of a twin;
    hemitrope.
  7. twofold or double.

v.t. 
  1. to bring together in close relationship;
    pair;
    couple.
  2. to furnish a counterpart to or a replica of;
    match.
  3. Informal Termsto divide or convert into two, parts, similar items, etc.:The old movie palace will be twinned, making two smaller theaters.
  4. Informal Termsto link or combine with:The new grocery store is twinned with a restaurant.
  5. Crystallographyto form into a twin.
  6. [Obs.]to give birth to as twins.

v.i. 
  1. to give birth to twins.
  2. to be paired or coupled.
  • bef. 900; Middle English; Old English twinn (adjective, adjectival), getwinn (noun, nominal and adjective, adjectival); akin to Old Frisian twīne, Old Norse tvinnr double, Gothic twaihnai

twin2 (twin),USA pronunciation v.t., v.i., twinned, twin•ning. [Scot.]
  1. Scottish Termstwine2.

Collins Concise English Dictionary © HarperCollins Publishers::
twin /twɪn/ n
    • either of two persons or animals conceived at the same time
    • (as modifier): a twin brother
    • either of two persons or things that are identical or very similar; counterpart
    • (as modifier): twin carburettors
  3. Also called: macle a crystal consisting of two parts each of which has a definite orientation to the other
 vb (twins, twinning, twinned)
  1. to pair or be paired together; couple
  2. (intransitive) to bear twins
  3. (intransitive) (of a crystal) to form into a twin
  4. (transitive)
    • to create a reciprocal relation between (two towns in different countries); pair (a town) with another in a different country
    • (intransitive) (of a town) to be paired with a town in a different country
Etymology: Old English twinn; related to Old High German zwiniling twin, Old Norse tvinnr doubleˈtwinning n
'twin' also found in these entries (note: many are not synonyms or translations):
Collocations: have a twin [brother, sister, sibling], an identical twin [brother], his fraternal twin [brother], more...

🗣️Forum discussions with the word(s) "twin" in the title:

a puddle jumper vs a twin-prop
a twin or two twins
A twin size bed is/has the size ......
avoiding those twin traps of overtreatment and therapeutic nihilism.
Double room & twin room
Either of the Twin Towers offer(s) a spectacular view of NY.
grew up never knowing she had/has a twin
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if he bends his one-inch bark into his twin, I slash it off with an iron whip
"If the women were the result of a twin birth"
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like twin ideas united in their pursuit to be separable and linked at the same time
My booking was <for> a twin room.
Name twin
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Standard room&Twin room&Double room
<subjecting> the dinosaur to twin forces of destruction
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the St. Louis Park School Board/a Twin Cities school board
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the twin problems of hunger and violence
the twin sister of Jack's vs.Jack's twin sister
The twin sisters have the same nose.
those precious twin lines of iron
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