Socket

—1. A rece , or a piece furnished with a rece , into which some other piece may be inserted and securely held; as, a socket in the ground for the reception of a post or pole. 2. The receptacle into which the base of an incandescent lamp is fitted. The most common form is a cylindrical metal shell coarsely threaded so that an Edison base may be screwed into it making contact with the terminals at the top. 3. In a telephone switchboard; a spring jack, a deep socket provided with contacts into which a conducting plug may be inserted for interconnecting subscribers.