opposite number ˌopposite ˈnumber noun [countable] JOBS
someone who has a similar job to yours in another organization or department:
• They liaised with their opposite numbers in the foreign subsidiaries for the production of publicity.
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opposite number UK US noun [C, usually singular]
► WORKPLACE a person who has a very similar job or rank to you in a different organization: »
The CEO is meeting her opposite number at Fukuda Electronics to discuss a possible joint venture.
Financial and business terms. 2012.