Definition of "twinning" [twin•ning]

• The bearing of twins. (noun)
• A pairing or union of two similar or identical objects. (noun)
• Mineralogy The formation of twin crystals. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And the ultimate separation, the ultimate twinning, is the separation between the lawyer and the self — the creation of a professional role that is not you, but comes to have a life of its own, that comes to be as important as the authentic self."
• "There is a type of transference called twinning, in which one person models themselves after an important person in their life."
• "I especially love the idea of twinning the Trans-Canada in Banff National Park."