See also: Twin and twin-


Alternative formsEdit


  • IPA(key): /twɪn/, [tʰw̥ɪn]
  • (file)
  • Rhymes: -ɪn

Etymology 1Edit

From Middle English twinne, twynne, from Old English ġetwin, ġetwinn (twin, multiple, noun) and twinn (twin, two-fold, double, two by two, adjective), from Proto-Germanic *twinjaz, *twinaz (two each), from Proto-Indo-European *dwino- (twin), from Proto-Indo-European *dwóh₁ (two). Cognate with Scots twyn (twin), Dutch tweeling (twin), German Zwilling (twin), Swedish tvilling (twin), Faroese tvinnur (a double set), Icelandic tvenna (duo, pair), Lithuanian dvynys (twin), Russian двойня (dvojnja, twin).


twin (plural twins)

  1. Either of two people (or, less commonly, animals) who shared the same uterus at the same time; one who was born at the same birth as a sibling.
  2. Either of two similar or closely related objects, entities etc.
  3. A room in a hotel, guesthouse, etc. with two beds; a twin room.
  4. (US) A twin size mattress or a bed designed for such a mattress.
  5. (crystallography) A twin crystal.
Derived termsEdit
See alsoEdit


twin (third-person singular simple present twins, present participle twinning, simple past and past participle twinned)

  1. (transitive, obsolete outside Scotland) To separate, divide.
  2. (intransitive, obsolete outside Scotland) To split, part; to go away, depart.
  3. (usually in the passive) To join, unite; to form links between (now especially of two places in different countries).
    Placetown in England is twinned with Machinville in France.
    Coventry twinned with Dresden as an act of peace and reconciliation, both cities having been heavily bombed during the war.
    • (Can we date this quote by Tennyson and provide title, author's full name, and other details?)
      Still we moved / Together, twinned, as horse's ear and eye.
  4. (intransitive) To be paired or suited.
  5. (intransitive) To give birth to twins.
    • 1874, Thomas Hardy, Far from the Madding Crowd:
      “I’ve run to tell ye,” said the junior shepherd, supporting his exhausted youthful frame against the doorpost, “that you must come directly. Two more ewes have twinned — that’s what’s the matter, Shepherd Oak.”
  6. (intransitive, obsolete) To be born at the same birth.
    (Can we find and add a quotation of Shakespeare to this entry?)
See alsoEdit

Etymology 2Edit

From Middle English *twin, *twyn, from Old English twin, twinn (twin; double, adjective), from Proto-Germanic *twīhnaz (occurring in a pair; twofold; double), from Proto-Indo-European *dwóh₁ (two). Cognate with Icelandic tvennur (double), Gothic 𐍄𐍅𐌴𐌹𐌷𐌽𐌰𐌹 (tweihnai, two each).


twin (not comparable)

  1. double; dual; occurring as a matching pair
    twin beds, twin socks
  2. forming a pair of twins.
    the twin boys
Derived termsEdit

Further readingEdit


Old EnglishEdit

Alternative formsEdit




  1. Alternative form of twinn