twinning

American  

[twin-ing] / ˈtwɪn ɪŋ /

noun

1. the bearing of two children at one birth.

2. the coupling of two persons or things; union.

3. Crystallography. the union of crystals to form a twin.

4. an act or instance of matching or resembling someone or something in a specific way, and the acknowledgment of this resemblance (often used attributively): I love those twinning outfits.

   accidental twinning;

   I love those twinning outfits.

   Look at their twinning duckfaces.

---

Etymology

Origin of twinning

First recorded in 1565–75; twin ¹ + -ing ¹

Example Sentences

After 24 years as Arsenal's vice-chairman, David Dein founded The Twinning Project in 2018, to forge bonds between football clubs and local prisons with the aim of minimising re-offending.

From BBC • Jun. 12, 2026

Twinning gas with solar and wind offers a way to ensure stable energy supplies and battle climate change, said energy executives and U.S. climate envoy John Kerry.

From Reuters • Mar. 10, 2022

Twinning himself with Sedgwick was one way for Warhol to ensure that it wouldn’t be easy to ignore him again.

From The Guardian • Feb. 16, 2020

Her 55-minute movie, The Twinning Reaction, played the festival circuit from early 2017, almost a full year before Three Identical Strangers premiered at Sundance.

From Slate • Jun. 29, 2018

Twinning may be several times repeated on the same plane or on other similar planes of the crystal, giving rise to triplets, 583 quartets and other complex groupings.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various