copper-fasten

British

verb

(tr) to make (a bargain or agreement) binding

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The UK have attempted to copper-fasten the idea of rapid improvement in national plans by asking all countries to attend a high-level ministerial meeting on climate change every year.

From BBC

There has been no serious effort to reform this, but many efforts instead to copper-fasten it.

From The Guardian

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023