A part corresponding to another part; anything which answers, or corresponds, to another; a copy; a duplicate; a facsimile.
- One that closely resembles another.
- One that has the same functions and characteristics as another; a corresponding person or thing: Their foreign minister is the counterpart of our secretary of state.
- A copy or duplicate of a legal paper.
- One of two parts that fit and complete each other.
- One that serves as a complement.