A coming together or touching, as of objects or surfaces. The state or condition of touching or of immediate proximity: Litmus paper turns red on contact with an acid. Connection or interaction; communication: still in contact with my former employer. Visual observation: The pilot made contact with the ship. Association; relationship: came into contact with new ideas at college. A person who might be of use; a connection: The reporter met with her contact at the mayor's office. A connection between two conductors that permits a flow of current or heat. A part or device that makes or breaks such a connection. Medicine. A person recently exposed to a contagious disease, usually through close association with an infected individual. A contact lens.