The definition of a counterpart is someone or something that is the equivalent to, or has the same features, functions and/or characteristics as someone or something else.
(noun)An example of counterpart is when you fill the same role at your office as someone in a different branch office.
See counterpart in Webster's New World College Dictionary
noun
Origin: ME countrepart: see counter- & part
See counterpart in American Heritage Dictionary 4
noun
Learn more about counterpart