- a partner or associate, as in a business.
Origin of copartner
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for co-partner
And just to this extent he had become a co-partner in their crime.The Pit Prop Syndicate
Freeman Wills Crofts
The latter found the National Founders' Association as their antagonist or potential "co-partner" in the industry.A History of Trade Unionism in the United States
How could it be right to make even a faithful servant a co-partner in rule?The Bbur-nma in English
Babur, Emperor of Hindustan
At this juncture of affairs Almagro, a co-partner in the Peruvian expedition, arrived on the scene with a strong reinforcement.Wealth of the World's Waste Places and Oceania
Jewett Castello Gilson
In the other I was a co-partner, and only received, on a division, the equal portion allotted me.
- a partner or associate, esp an equal partner in business
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