Twinning

Twinning (making a twin of) may refer to:


 * In biology and agriculture, producing two offspring (i.e., twins) at a time, or having a tendency to do so
 * In engineering and manufacturing, the creation of a digital twin or the synching of such twins
 * Twin towns and sister cities, towns and cities involved in town twinning
 * eTwinning, an EU collaboration project in which two schools in different locations are paired and communicate using the internet
 * Afri Twin, an exchange partnership between schools in the United Kingdom and South Africa
 * Twinning (roads), construction of one road next to another
 * In crystallography, crystal twinning refers to intergrown crystal forms that display a twin boundary
 * In film, special effects that multiply the presence of the same actor or actress on screen
 * In animation, twinning refers to when two parts on opposite sides of a character's body move the same way
 * A type of transnational education in which a student does part of their degree course in a local private college and part of it in an overseas institution tied to the college
 * Twinning (TV series), a 2015 reality show on VH1