Liaison (lē’ā-zŏn’) is a link, connection or bond. It is commonly used to describe a communication or co-operation between two groups or units within an organization (e.g., co-operation between two different military forces). The person who works to connect two groups or units can also be called liaison (e.g., liaison officer).
Hollywood and the Pentagon: A Dangerous Liaison (NYTimes.com)
Jonathan Martin reports that some of those supporters got together in Michigan this week to meet with Mr McCain’s social conservative liaison, Marlys Popma. (Economist.com)