opposite number, one's

(one's) opposite number

Someone who has the same or very similar position, role, or function in a different group, company, or country; one's counterpart elsewhere. I've been going over the merger details with my opposite number in the XYZ Media. The Environmental Protection Agency and their opposite numbers around the globe have been negotiating new legislation aimed at curbing the effects of climate change.
See also: number, opposite

opposite number, one's

One's counterpart, as in He's my opposite number in the California office. This expression is generally used for a person's equivalent in another organization or system ( number alluding to their position in a hierarchy). [c. 1900]
See also: opposite