/kown"teuhr pahrt'/ , n.
1. a person or thing closely resembling another, esp. in function: Our president is the counterpart of your prime minister.
2. a copy; duplicate.
3. Law. a duplicate or copy of an indenture.
4. one of two parts that fit, complete, or complement one another.
[ 1425-75; late ME; see COUNTER-, PART ]