twin

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/twɪn/
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A pair of two related things, most commonly two children born together, and by extension the idea of duplication, pairing, or a linked relationship in many contexts.

Examples

  • He wrote a letter to his twin overseas.
  • The committee twinned the two proposals into a single plan.
  • The twins twin their outfits every Halloween.
  • They twin the data streams to ensure redundancy.
  • We are twinning the two files into one archive.

Similar words

double
dual
brother
sibling
duplicate
couple
pair
duplicate
link
match

Meanings

One of two children born at the same time

noun
biology
neutral
A person who shares the same birth event with exactly one sibling.

Examples

  • My twin and I celebrated our birthday together.
  • The doctor told the twin that they were healthy.
  • She looked at her twin and smiled.
  • The twin in the next crib was crying loudly.
  • Our family reunion always includes the twin from each set.
  • He wrote a letter to his twin overseas.
  • The twin on the left was born five minutes earlier.

Similar words

Paired or double in nature

adjective
everyday
neutral
Describing something that exists as one of a matched pair or that has two identical parts.

Examples

  • The hotel offers twin rooms for two guests.
  • She bought a twin set of earrings.
  • The twin towers dominate the skyline.
  • Our garden has twin apple trees planted side by side.
  • The twin study desks are perfect for siblings.
  • He prefers a twin mattress for extra comfort.
  • The twin bridges were built to span the river.

Similar words

Etymology

From Old English twinn ‘double’, from Proto-Germanic twinaz ‘two each’.

FAQ

What does twin mean as a noun?

Twin is one of two children born at the same time, sharing a single birth event.

How is twin used as an adjective?

When twin describes something, it means the item is paired, double, or has an identical counterpart.

How do you use twin as a verb?

As a verb, twin means to pair, match, or link two things, such as cities that become sister cities.

Is twin ever used in technology?

Yes, in computing twin can refer to processes that run in parallel or duplicated data streams.

What is the origin of the word twin?

Twin comes from Old English twinn ‘double’, itself from Proto‑Germanic twinaz.

What is a common mistake when using twin?

A frequent error is treating twin as a plural noun for a single sibling, saying ‘I have twins’ instead of ‘I have a twin’.

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