Definition of twin in English:

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Pronunciation: /twin/


1One of two children or animals born at the same birth.
Example sentences
  • Nearly 10,000 multiple births were recorded last year in the UK, and one in 35 children is now born as a twin, while triplet births have quadrupled in many countries.
  • A mother had to be flown to a Norwich hospital to give birth to identical twins because there were not enough incubators at Southend's premature baby unit.
  • Now, tell me if you think I am wrong, but, if it wasn't for the fact that Cameron is nearly a decade older, they look like identical twins separated at birth!
1.1A person or thing that is exactly like another: there was a bruise on his cheek, a twin to the one on mine
More example sentences
  • The recently launched Mercedes S-class could be a twin to BMW's 7-series.
  • Her shrieking, wailing voice was the whisper of mortality piercing the ears like the banshee's own call, a twin to the driving terror that pierced the mind.
  • He could have just been a twin to the smaller man.
duplicate, double, carbon copy, exact likeness, mirror image, replica, look-alike, doppelgänger, clone;
counterpart, match, pair
1.2 (the Twins) The zodiacal sign or constellation Gemini.
2Something containing or consisting of two matching or corresponding parts, in particular.
2.1A twin-bedded room.
Example sentences
  • This price is based on two people sharing a twin / double bedded room on a bed and breakfast basis and dates offered start in May and go through to October.
  • My room, a twin, is plainly furnished but very nice.
  • With the exception of suites, all two-bedded rooms are twins.
2.2A twin-engined aircraft.
Example sentences
  • As the world's first dedicated multi trainer, the Apache helped teach America's future airline pilots to fly twins.
  • It may come as a surprise, but not all twins are high-performance airplanes.
  • Here are some critical situations that you should be familiar with and practice regularly to become competent flying twins.
2.3A twinned crystal.
Example sentences
  • Among the twinned crystals, Baveno twins are more common than Manebach.
  • The original cordierite crystals were sixling twins that give the pseudomorphs a flower-shaped cross section.
  • It occurs as small, white single crystals or twins densely covering matrix.


1Forming, or being one of, a pair born at one birth: she gave birth to twin boys her twin sister
More example sentences
  • Witnesses say they saw nothing-just a little boy and his twin sister playing at the sand part of the park while many other children ran around, screaming.
  • Ailsa looked down at her older twin sisters and the boy who was with them.
  • Gavin caught up utterly out of breath and he gave a look of complete gratitude to the twin sisters.
1.1Forming a matching, complementary, or closely connected pair: the twin problems of economic failure and social disintegration
More example sentences
  • As it was, its thick grey walls and twin turrets gave it a look of defensibility, as though it were here despite the quiescent malice of the forest.
  • Since independence, the twin forces of economic development and population growth have literally bulldozed their way through the city's greenery.
  • Who in the world would we rather have as allies and fellow travellers in pursuing the twin challenges of economic performance and social justice?
matching, identical, matched, paired
twofold, double, dual;
related, linked, connected;
corresponding, parallel, complementary, equivalent
1.2 Botany Growing in pairs: twin seed leaves
1.3(Of a bedroom) containing two single beds.
Example sentences
  • There is a choice of single or twin rooms, and every bedroom is en-suite.
  • The attic is converted to offer two more bedrooms, both twin rooms with solid timber floors.
  • She will have a twin room for single use as well as breakfast and her evening meal.
1.4(Of a crystal) twinned.
Example sentences
  • Continuing on your tour you see a 70-cm-high giant twin calcite crystal from Siberia that gives off an amber glow in sunlight.

verb (twins, twinning, twinned)

[with object] (usually be twinned)
Link; combine: the company twinned its core business of brewing with that of distilling
More example sentences
  • His best-selling dish twins pepper shrimp with a rum and ginger sauce.
  • In habitually using the term ‘nation-state’ to describe our collective status, we assume these two entities to be indissolubly twinned.
  • The two groups were twinned back in 1998 as part of a Co-Operation Ireland initiative.
combine, join, link, couple, pair


Late Old English twinn 'double', from twi- 'two'; related to Old Norse tvinnr. Current verb senses date from late Middle English.

  • two from Old English:

    An Old English word from the same source as twain, twelve, twenty, twilight, and twin (all OE), with an ancient root shared by Latin and Greek duo, source of double (Middle English), duo (late 16th century), duplicate (Late Middle English), and other words. The formula it takes two to…appeared in the 1850s in it takes two to make a quarrel, and in the 1940s in it takes two to make a bargain ( see also tango). The saying two's company, three's a crowd was originally two's company, three's none, in the 1730s. Before the British currency was decimalized in 1971 twopence or tuppence was a standard sum. To add or put in your twopenn'orth is to contribute your opinion; twopenn'orth is a contraction of twopennyworth meaning ‘an amount costing two pence’, used also for ‘a small or insignificant amount’.

Words that rhyme with twin

agin, akin, begin, Berlin, bin, Boleyn, Bryn, chin, chin-chin, Corinne, din, fin, Finn, Flynn, gaijin, Glyn, grin, Gwyn, herein, Ho Chi Minh, in, inn, Jin, jinn, kin, Kweilin, linn, Lynn, mandolin, mandoline, Min, no-win, pin, Pinyin, quin, shin, sin, skin, spin, therein, thin, Tientsin, tin, Tonkin, Turin, underpin, Vietminh, violin, wherein, whin, whipper-in, win, within, Wynne, yin

For editors and proofreaders

Syllabification: twin

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